Description : An object is displaced by 10 meters in the direction of applied force. If the applied force is 75 N, What is the work done by the force? -Physics
Last Answer : (d) 750 joule
Description : When a potter makes pots of different size and shape from kneaded clay. This change in shape and size is due to ________. a) force b)pressure c)area d)direction
Last Answer : a) force
Description : What is the change of position of an object in a certain direction ?
Last Answer : Moving is the change of position of an object in a certain direction.
Description : Air resistance ______ with an increase in the speed of the object moving through it. a) increases b)decreases c)remains same d)no change
Last Answer : a) increases
Description : What must happen for an object to stop start change speed or change direction?
Last Answer : A net force must be applied to the object. That is, the vectorsum of ALL the forces acting on the object must not be zero.
Description : Newton is used to measure ______. (1) Speed (2) Volume (3) Force (4) Area
Last Answer : (3) Force Explanation: The newton (N) is the International System of Units (SI) derived unit of force. It is named after Isaac Newton in recognition of his work on classical mechanics, specifically Newton's second law of motion.
Description : A satellite is observed to move in a circle about the earth at a constant speed. This means that the force acting upon it is: w) zero x) parallel to the direction of the satellite ... velocity y) perpendicular to the direction of the satellite's instantaneous velocity z) none of the above
Last Answer : ANSWER: Y -- PERPENDICULAR TO THE INSTANTANEOUS DIRECTION OF THE SATTELITE’S VELOCITY
Description : Centripetal force is dependent on three factors, the odd one out of these factors is A. Mass of the rotating object B. Speed of the rotating object C. Volume of the rotating object D. Path radius
Last Answer : Volume of the rotating object
Description : Resultant force acting on object and rate of change of linear momentum are A. inversely related B. not related at all C. directly related D. directly proportional
Last Answer : directly related
Description : A charged particle is moving in a UNIFORM magnetic field. If the direction of motion of the charged particle is at right angles to the magnetic field, describe the shape of the charged particle's path.
Last Answer : ANSWER: CIRCULAR or CIRCLE
Description : A charged particle is moving in a UNIFORM magnetic field. If the direction of motion of the charged particle is parallel to the magnetic field, describe the shape of the charged particle's path.
Last Answer : ANSWER: STRAIGHT LINE
Description : In what direction does the buoyant force on an object fully immersed in a liquid act ? -Science
Last Answer : upward direction
Description : If there is to be a change in velocity, there MUST be a change in w) speed only x) direction only y) either speed or direction z) both speed and direction
Last Answer : ANSWER: Y -- EITHER SPEED OR DIRECTION
Description : For an object moving in uniform circular motion, the direction of the instantaneous acceleration vector is: w) tangent to the path of motion x) equal to zero y) directed radially outward z) directed radially inward
Last Answer : ANSWER: Z -- DIRECTED RADIALLY INWARD
Description : A falling drop of rain water ac-quires the spherical shape due to – (1) Viscosity (2) Surface Tension (3) Atmospheric pressure (4) Gravitational force
Last Answer : (2) Surface Tension Explanation: Raindrops start out as round high in the atmosphere as water collects on dust and smoke particles in clouds. But as raindrops fall, they lose their rounded ... the molecules stick together. The cause is the weak hydrogen bonds that occur between water molecules.
Description : A falling drop of rain water acquires the spherical shape due to (1) Viscosity (2) Surface Tension (3) Atmospheric pressure (4) Gravitational force
Last Answer : Surface Tension
Description : ______ is the perpendicular distance between point of application of force and axis of rotation. (1) Moment arm (2) Moment of Inertia (3) Altitude (4) Base
Last Answer : (1) Moment arm Explanation: The magnitude of the moment of force acting about a point or axis is directly proportional to the distance of the force from the point or axis.
Description : A single fixed pulley is used to draw water from a well because – (1) efficiency is 100% (2) velocity ratio is low (3) mechanical advantage is high (4) force is applied in a convenient direction
Last Answer : (4) force is applied in a convenient direction Explanation: A single fixed pulley is used to lift a load upwards by applying efforts downward's. The load and effort move equal distance but in opposite ... apply effort in downward direction. They are used on flag-poles and to draw water from a well.
Description : Direction of momentum is direction of object's A. mass B. acceleration C. velocity D. frictional force
Last Answer : velocity
Description : According to Newton's 2nd law the object's acceleration and centripetal force are A. at right angles to each other B. anti parallel to each other C. make acute angle with each other D. in same direction
Last Answer : in same direction
Description : An electron is directly west of a proton. The force on the electron is in what direction: north, south, east, or west?
Last Answer : ANSWER: EAST or TOWARD THE PROTON
Description : The force on a charged particle moving parallel to magnetic field lines is: w) in the direction of the field x) zero y) perpendicular to the field z) in the opposite direction of the field
Last Answer : ANSWER: X -- ZERO
Description : When a charge moves through an electric circuit in the direction of an electric force it does one of the following four things. Does it: w) lose potential energy and gain kinetic energy x) ... lose kinetic energy y) lose both potential and kinetic energy z) gain both potential and kinetic energy
Last Answer : ANSWER: W -- LOSE POTENTIAL ENERGY AND GAIN KINETIC ENERGY
Description : A single fixed pulley is used to draw water from a well because (1) efficiency is 100% (2) velocity ratio is low (3) mechanical advantage is high (4) force is applied in a convenient direction
Last Answer : force is applied in a convenient direction
Description : A solid created by rotating a planar-shape about an axis is called a “Surface of Revolution”. The figure below shows a shape and the axis of revolution which is used to create such a solid. Which of the options would be the correct top view of this solid?
Last Answer : B
Description : If the force exerted on an object is zero then the object will remain stationary- Explain ?
Last Answer : Zero force applied to an object means that the value of acceleration in it is zero. And since acceleration is needed to move a stable object, zero value of acceleration means that the object will remain stationary.
Description : What is the relation between mass and acceleration if the force applied to an object is constant ?
Last Answer : The lower the mass, the higher the acceleration.
Description : An object at rest will remain at rest and an object in motion will remain in motion until and unless it is acted upon by an external force. This is Newton's – (1) First law (2) Second law (3) Third law (4) Fourth law
Last Answer : (1) First law Explanation: Newton's first law of motion - sometimes referred to as the law of inertia-states that every object will remain at rest or in uniform motion in a straight line unless ... its state by the action of an external force. This is normally taken as the definition of inertia.
Description : Object is in equilibrium if resultant force acting on it is A. increasing B. decreasing C. zero D. becomes constant
Last Answer : zero
Description : A force of 15 newtons is acting on an object which has a mass of 3 kilograms. If this is the only force acting on the object, what is the acceleration of the object?
Last Answer : ANSWER: 5 METERS PER SECOND SQUARED
Description : When the speed of a rear-drive car is increasing on a horizontal road the direction of the frictional force on the tires is:
Last Answer : When the speed of a rear-drive car is increasing on a horizontal road the direction of the ... the front tires and forward for the rear tires
Description : Can a net force be applied to an object and still have the object maintain constant speed?
Last Answer : yes, as in the case of a satellite orbiting the earth; it is moving with constant speed but not constant velocity as its direction is always changing as it orbits. The net force is provided by gravity accelerating it inward and preventing into from flying away into space
Description : What centripetal force is needed to keep a kg object moving at a constant speed of ms in a circle having a radius of 4 m?
Last Answer : What is the answer ?
Description : Railway tracks are banked on curves so that (a) Necessary centrifugal force may be obtained from the horizontal component of the weight of the train (b) Frictional force can be avoided between the tracks ... of the weight of the train (d) The train may not fly off in the opposite direction
Last Answer : Ans:(c)
Description : The set point current at which a magnetic-type overload relay tends to trip may be increased by turning the dashpot in the 'lower' direction. This action _____________. A. reduces magnetic force on ... the relay D. increases magnetic force on the plunger and requires less current to trip the relay
Last Answer : Answer: A
Description : A moving fluid mass may be brought to a static equilibrium position, by applying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called (A) Pascal's law (B) (C) D-Alembert's principle (D) None of these
Last Answer : Answer: Option C
Description : 1. Can you name a few objects which change their shape and size on application of a force
Last Answer : 1. Can you name a few objects which change their shape and size on application of a force and ... shape and size when the external force is removed?
Description : Decibel is the unit of ______. (1) Speed of light (2) Intensity of sound (3) Intensity of heat (4) None of these
Last Answer : (2) Intensity of sound Explanation: Decibel (dB) unit is used for expressing the ratio between two amounts of electric or acoustic power for measuring the relative loudness of sounds.
Description : We always see the same lace of the moon, because - (1) It is smaller than the earth (2) It revolves on its axis in a direction opposite to that of the earth (3) It takes equal time for revolution ... the earth and rotation on its own axis (4) It rotates at the same speed as the earth around the sun
Last Answer : (3) It takes equal time for revolution around the earth and rotation on its own axis Explanation: It is tidal locking that causes the synchronous rotation which causes the Moon to present "just one side ... to revolve (orbit) around the Earth. So it maintains a "constant face" in our direction.
Description : Stationary wave is formed by – (1) a transverse wave superposing a longitudinal wave (2) two waves of the same speed superposing (3) two waves of same frequency travelling in the same direction (4) two waves of same frequency travelling in the opposite direction
Last Answer : (4) two waves of same frequency travelling in the opposite direction Explanation: Stationary or standing waves are formed in a medium when two waves having equal amplitude and frequency moving in ... and the reflected wave. Both longitudinal and transverse types of waves can form a stationary wave.
Description : Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is : (1) 1.0 (2) 1.2 (3) 1.5 (4) 2.0
Last Answer : (1) 1.0 Explanation: Since the amplitudes, frequency and the speed of both the waves are in same, hence the wavelength of the composite wave will be the same as the single wave.
Description : Anemometer is used to measure – (1) wind direction (2) wind velocity (3) pressure gradient (4) wind speed and time
Last Answer : (2) wind velocity Explanation: An anemometer is a device for measuring wind speed, and is a common weather station instrument. The first known description of an anemometer was given by Leon Battista Alberti around 1450.
Description : Momentum of two objects moving with same speed but in opposite direction upon collision is A. increased B. decreased C. is zero D. is infinite
Last Answer : is zero
Description : Speed of a body in particular direction can be called A. acceleration B. displacement C. velocity D. distance
Description : A ball is thrown vertically upwards from the ground with a speed of 80 feet/second. In the English system of units, what is the magnitude and direction of the acceleration of the ball?
Last Answer : ANSWER: 32 FEET PER SECOND SQUARED DOWN or TOWARDS THE EARTH
Description : The greatest induced EMF will occur in a straight wire moving at constant speed through a uniform magnetic field when the angle between the direction of the wire's motion and the direction of the magnetic field is w) 0 degrees x) 30 degrees y) 60 degrees z) 90 degrees
Last Answer : ANSWER: Z -- 90 DEGREES
Description : A helicopter is ascending vertically with a constant speed of 6 meters per second relative to the ground. At the instant the helicopter is 60 meters above the ground it releases a package. What is ... of the package, relative to the ground, the instant the package is released by the helicopter?
Last Answer : ANSWER: 6 METERS/SECOND UP
Description : Stationary wave is formed by (1) a transverse wave superposing a longitudinal wave (2) two waves of the same speed superposing (3) two waves of same frequency travelling in the same direction (4) two waves of same frequency travelling in the opposite direction
Last Answer : two waves of same frequency travelling in the opposite direction
Description : Anemometer is used to measure (1) wind direction (2) wind velocity (3) pressure gradient (4) wind speed and time
Last Answer : wind velocity