Description : A man in a train moving with a constant velocity drops a ball on the platform. The path of the ban as seen by an observer standing on the platform is – (1) A straight line (2) A circle (3) A parabola (4) None of these
Last Answer : (3) A parabola Explanation: In the reference frame of the platform the ball has initial horizontal velocity equal to the velocity of the train. The vertical direction is the same observed on the train because both observers agree that gravity is acting on the ball causing an acceleration g.
Description : A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside the train will find the trajectory of the coin to be - (1) a parabola (2) a horizontal straight line (3) a vertical straight line (4) a circle
Last Answer : (1) a parabola Explanation: Parabola, because when the coin is dropped at a particular point, it has the same velocity as the running train. So, by Newton's first law, it continues its motion horizontally with that velocity.
Description : To a person standing on shore, an object dropped from the mast of a passing sailboat will trace what path, assuming negligible air resistance. Is it: w) vertical straight line x) slanted straight line y) parabola z) hyperbola
Last Answer : ANSWER: Y -- PARABOLA
Description : If a boy sitting in a train, which is moving at a constant velocity, throws a ball straight up into the air, the ball will – (1) Fall in front of him (2) Fall behind him (3) Fall into his hand (4) None of the above
Last Answer : (3) Fall into his hand Explanation: If a person throws a ball vertically upwards in a moving train, it comes hack to his hand. The moment the ball was thrown, the ball was also in motion alone with ... ball move ahead by the same distance. This makes the ball to come back to his hand on its return.
Description : If a boy sitting in a train, which is moving at a constant velocity, throws a ball straight up into the air, the ball will (1) fall in front of him (2) fall behind him (3) fall into his hand (4) None of the above
Last Answer : fall into his hand
Description : A man standing close to the platform at a railway station experiences a pulling force towards a fast moving train because of (1) gravitational force between train and man. (2) illusion of the man (3) the centripetal force (4) pressure difference due to fast moving air in between
Last Answer : (4) pressure difference due to fast moving air in between Explanation: When a fast-moving train passes a man standing on the platform at rest, the air between train and person also moves with ... higher pressure, and being behind the man standing close will tend to push him toward the train.
Description : A man standing close to the platform at a railway station experiences a pulling force towards a fast moving train because of __________ . (1) gravitational force between train and man (2) illusion of the man (3) the centripetal force (4) pressure difference due to fast moving air in between
Last Answer : pressure difference due to fast moving air in between
Description : Assuming constant gravity and no air resistance, the path of a cannonball fired from a cannon is: w) a semi-circle x) an ellipse y) a parabola z) a hyperbola
Last Answer : ANSWER: Y -- A PARABOLA
Description : Path followed by water jet issuing from the bottom of a water tank will be a (A) Parabola (vertex being at the opening) (B) Hyperbola (C) Horizontal straight line (D) Zig-zag path (which is geometrically undefined)
Last Answer : (A) Parabola (vertex being at the opening)
Description : The locus of reaction of a two hinged semi-circular arch, is (A) Straight line (B) Parabola (C) Circle (D) Hyperbola
Last Answer : (A) Straight line
Description : The locus of the moment of inertia about inclined axes to the principal axis, is (A) Straight line (B) Parabola (C) Circle (D) Ellipse
Last Answer : (D) Ellipse
Description : The locus of the end point of the resultant of the normal and tangential components of the stress on an inclined plane, is (A) Circle (B) Parabola (C) Ellipse (D) Straight line
Last Answer : (C) Ellipse
Description : If there is no impervious boundary at the bottom of a hydraulic structure, stream lines tend to follow: (A) A straight line (B) A parabola (C) A semi-ellipse (D) A semi-circle
Last Answer : (C) A semi-ellipse
Description : A boy sitting in a rail road car throws a ball straight up into the air. The ball will fall back into his hands when the rail road car is a.moving at constant velocity b.accelerating ... inclined plane, while another identical block B is released for free fall from the same height e.decelerating
Last Answer : a. moving at constant velocity
Description : A boy is standing on an elevator which is traveling downward with a constant velocity of 30 meters per second. The boy throws a ball vertically upward with a velocity of 10 meters per second ... the ball, MAGNITUDE AND DIRECTION, relative to the elevator shaft the instant the boy releases the ball?
Last Answer : ANSWER: 20 METERS PER SECOND DOWN
Description : When a body is moving along a circular path, it's velocity is directed towards A. center B. normal C. tangent D. parallel to circle
Last Answer : tangent
Description : A person standing on a railway platform listens to the whistles of arriving and departing trains. The whistle heard is – (1) the same in both cases in all respects (2) of higher intensity when train arrives (3) of higher pitch when train arrives (4) of higher pitch when train departs
Last Answer : (3) of higher pitch when train arrives Explanation: Sound is a sequence of waves of pressure that propagates through compressible media such as air or water. (Sound can propagate through solids as well, but there are additional modes of propagation).
Description : A person standing on a railway platform listens to the whistles of arriving and departing trains. The whistle heard is - (1) the same in both cases in all respects (2) of higher intensity when train arrives (3) of higher pitch when train arrives (4) of higher pitch when train departs
Last Answer : (3) of higher pitch when train arrives
Description : A person standing on a railway platform listens to the whistles of arriving and departing trains. The whistle heard is (1) the same in both cases in all respects (2) of higher intensity when train arrives (3) of higher pitch when train arrives (4) of higher pitch when train departs
Last Answer : of higher pitch when train arrives
Description : A boy sitting in an open car moving with the constant speed throws a ball straight up into the air. (1) The ball falls – (2) Behind him (3) In front of him (4) Into his hand
Last Answer : (1) Behind him Explanation: The moment ball is thrown, it is moving with the velocity of the car. According to the inertia of motion it will continue to move in the same direction with the same ... is not possible to neglect the resistance caused by air friction. So, the ball will fall behind him.
Description : A boy sitting in an open car moving with the constant speed throws a ball straight up into the air. The ball falls (1) behind him (2) in front of him (3) into his hand (4) by his side
Last Answer : behind him
Description : Which of the following represents the plot of filtrate volume versus time for constant pressure filtration? (A) Parabola (B) Straight line (C) Hyperbola (D) Exponential curve
Last Answer : (A) Parabola
Description : how would an observer on train a witch is moving at nearly the speed of light view o'clock on train be which is moving at the same speed and in the same direction?
Last Answer : The clock on train B would appear to be the same width and to run at the same rate
Description : Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one (A) Ellipse (B) Hyperbola (C) Parabola (D) Circle
Last Answer : (B) Hyperbola
Description : Graph of p against 1⁄V is A. curve B. straight line C. parabola D. hyperbola
Last Answer : straight line
Description : When an electron is moving horizontally between oppositely charged plates, it will move in the A. straight line B. fall directly downwards C. move towards positive plates D. curved path
Last Answer : curved path
Description : A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct? (1) Both the ... reach the ground first. (4) The question is incomplete because the masses of the spheres are not given.
Last Answer : (1) Both the spheres will reach the ground simultaneously. Explanation: If no air resistance is present, the rate of descent depends only on how far the object has fallen, no matter how heavy ... objects will reach the ground at the same time if they are dropped simultaneously from the same height.
Description : A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct ? (1) Both the ... reach the ground first. (4) The question is incomplete because the masses of the spheres are not given.
Last Answer : Both the spheres will reach the ground simultaneously.
Description : A body moving in a circular path with a constant speed has a – (1) constant velocity (2) constant acceleration (3) constant kinetic energy (4) constant displacement
Last Answer : (3) constant kinetic energy Explanation: In circular motion, the magnitude of the velocity of the body is constant but the direction is constantly changing. This means that, even though the speed is ... accelerating. At any instant, the direction of the velocity is a tangent to the circular path.
Description : A body moving in a circular path with a constant speed has a (1) constant velocity (2) constant acceleration (3) constant kinetic energy (4) constant displacement
Last Answer : constant kinetic energy
Description : A particle of mass m is moving along a straight path through the origin of coordinates with a velocity v. The angular momentum of the particle about the origin (a) mv (b) Depends on its distance from origin (c) Is zero (d) Changes from positive to negative as it passes through the origin
Last Answer : Ans:(c)
Description : A train goes past a railway station at a high speed. A young boy standing on the edge of the platform is likely to _____? A. Fall away from the train B. Remain unaffected C. Fall towards the train D. Fall away from or towards the train depending upon the speed
Last Answer : ANSWER: C
Description : A train goes past a railway station at a high speed. A young boy standing on the edge of the platform is likely to -----? A. Remain unaffected B. Fall away from the train C. Fall towards the train (Answer) D. Fall away from or towards the train depending upon the speed
Last Answer : C. Fall towards the train (Answer)
Description : A train crosses a platform and a scooter standing on the platform in 20 seconds, 12seconds respectively.What is the length of the platform if the speed of the train is 25 km/hr? A) 55.8 m B) 75m C) 124m D) 68.5m
Last Answer : Answer: A Explanation: Given that, The speed of the train = 25km/hr = 25x 5/18 m/sec = 125/18 m/sec The train crosses a scooter in 12 seconds. Then, Length of the train = 125/18*12= 83.33 Now, ... 18(X +83.3)= 2500 18X=1000.6 X=55.58 m Hence the platform is 55.58 m long.
Description : A car is moving in a straight path. What is the motion of the car? -Physics
Last Answer : Rectilinear motion or straight line motion
Description : According to special theory of relativity the mass of a particle – (1) increases with increase in velocity with respect to an observer. (2) decreases with increase in velocity. (3) decreases with decrease in velocity. (4) is independent of its velocity.
Last Answer : (1) increases with increase in velocity with respect to an observer. Explanation: According to the Special Theory of Relativity, the mass of a moving object measures more as its velocity increases until, ... becomes infinite. This is because as an object gains speed, it gains more (kinetic) energy.
Description : According to special theory of relativity the mass of a particle (1) increases with increase in velocity with respect to an observer. (2) decreases with increase in velocity. (3) decreases with decrease in velocity. (4) is independent of its velocity.
Last Answer : increases with increase in velocity with respect to an observer.
Description : According to the equation ‘r = (mv)⁄(Be)’, the faster moving particles A. move in smaller circle B. move straight C. move in bigger circle D. move randomly
Last Answer : move in bigger circle
Description : A hot liquid is kept in a big room. The logarithm of the numerical valueof the temperature difference between the liquid and the room is plotted against time. The plot will be very nearly a/an (A) Ellipse (B) Straight line (C) Parabola (D) Circular arc
Last Answer : (B) Straight line
Description : A cable with a uniformly distributed load per horizontal metre run will take the following shape (A) Straight line (B) Parabola (C) Hyperbola (D) Elliptical
Last Answer : (B) Parabola
Description : Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a (A) Straight line (B) Sine curve (C) Parabola (D) Hyperbola
Description : Camber in pavements is provided by (A) Straight line method (B) Parabola method (C) Straight at the edges and parabolic at the crown (D) All the above
Last Answer : Answer: Option D
Description : The stress-strain curve concrete in compression follows [ A ] a straight line [ B ] a rectangular parabolic curve [ C ] a semi circular arc [ D ] a cubic parabola
Last Answer : [ B ] a rectangular parabolic curve
Description : The graphical representation of Ohms law is a. hyperbola b. Ellipse c. parabola d. straight line
Last Answer : d. straight line
Description : For any part of a beam subjected to uniformly distributed load, bending moment diagram is (a) Horizontal straight line (b) Vertical straight line (c) Line inclined to x-axis (d) Parabola
Last Answer : d) Parabola
Description : For any part of a beam subjected to uniformly distributed load, Shear force diagram is (a) Horizontal straight line (b) Vertical straight line (c) Line inclined to x-axis (d) Parabola
Last Answer : (c) Line inclined to x-axis
Description : For any part of a beam between two concentrated load, Bending moment diagram is a (a) Horizontal straight line (b) Vertical straight line (c) Line inclined to x-axis (d) Parabola
Description : 7-For any part of the beam, between two concentrated load Shear force diagram is a (a) Horizontal straight line (b) Vertical straight line (c) Line inclined to x-axis (d) Parabola
Last Answer : Na