Description : The velocity-time graph shows the motion of a cyclist. Find (i) its acceleration (ii) its velocity (iii) the distance covered by the cyclist in 15 seconds Numerical Questions and answers on Motion for Class 9 physics -Science
Last Answer : (i) We can see from the graph that velocity is not changing So,acceleration is equal to zero. (ii) By Reading the graph, velocity = 20 m/s (iii) Distance covered in 15 seconds, s=u×t=20×15=300s=u×t=20×15=300 m
Description : The first equation of motion gives the relation between : (1) Position and time (2) Position and Velocity (3) Velocity and time (4) Velocity and acceleration
Last Answer : (3) Velocity and time Explanation: The equation v = u + at is called Newton's first equation of motion, where, u = Initial velocity, v = Final velocity, a = acceleration and t = time.
Description : There are three equations of uniformly accelerated motion, the odd one out is A. final_velocity = initial_velocity + (acceleration time) B. distance_moved = (initial_velocity time) ... acceleration distance_moved) D. final_velocity = initial_velocity + (2 acceleration distance_moved)
Last Answer : final_velocity = initial_velocity + (2 × acceleration × distance_moved)
Description : A particle starts from rest and moves in a straight line whose equation of motion is given by S = 2t3 - t2 - 1. The acceleration of the particle after one sec will be a.6 m/sec2 b.4 m/sec2 c.12 m/sec2 d.10 m/sec2 e.8 m/sec2
Last Answer : d. 10 m/sec2
Description : During planetary motion which of the following remains constant? a.Augular speed b.Linear velocity c.Angular acceleration d.Total angular momentum e.All of the above
Last Answer : b. Linear velocity
Description : Explain whether there is acceleration of a rotating object at a balanced speed in a circular motion ?
Last Answer : : In a circular path, there is no acceleration of the rotating object at a balanced speed The rate of change of unequal velocity is called acceleration. So if the velocity is balanced , there will be no acceleration Be it in a circular way or in a straight way.
Description : Frame the formula: final velocity (v) of a body in linear motion is equal to the sum of its initial velocity (u) and the product of acceleration (a) a
Last Answer : Frame the formula: final velocity (v) of a body in linear motion is equal to the sum of its initial velocity (u) and ... v=u-at C. v=u+at D. v=-u-at
Description : Derive the expression for average acceleration and instantaneous acceleration for the motion of an object in x-y plane.
Last Answer : Derive the expression for average acceleration and instantaneous acceleration for the motion of an object in x-y plane.
Description : Derive equations of motion graphically for a particle having uniform acceleration, moving along a straight line.
Last Answer : Derive equations of motion graphically for a particle having uniform acceleration, moving along a straight line.
Description : If the motion of an object is described by x = f(t) write formulae for instantaneous velocity and acceleration.
Last Answer : If the motion of an object is described by x = f(t) write formulae for instantaneous velocity and acceleration.
Description : For uniform acceleration in rectilinear motion which of the following is not correct?
Last Answer : For uniform acceleration in rectilinear motion which of the following is not correct? (A) ... displacement (D) Velocity-time graph is nonlinear
Description : How do you use Newtons second law of motion to describe the relationship between force mass and acceleration?
Last Answer : Need answer
Description : What According to the second law of motion the mass of an object is proportional to the acceleration of that object?
Last Answer : Feel Free to Answer
Description : According to newton second law of motion, the acceleration of an object equals the net force acting on the object divide by the object?
Last Answer : Mass.
Description : A satellite moving round the earth with a uniform speed has _____? A. An accelerated motion B. No acceleration at all C. Uniform acceleration D. Uneven acceleration
Last Answer : ANSWER: C
Description : A sheet of paper can be pulled out quickly from under a glass of water without spilling the water. This phenomenon illustrates (a) lack of friction between paper and glass (b) newton’s third law of motion (c) inertia (d) acceleration
Last Answer : Ans:(c)
Description : A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that (a) Its ... ) Its acceleration is constant (c) Its kinetic energy is constant (d) It moves in a circular path
Last Answer : Ans:(d)
Description : The motion of a body around a circular path is an example of – (1) Uniform velocity, variable acceleration (2) Uniform speed, uniform velocity (3) Uniform speed, variable velocity (4) Uniform speed, variable acceleration
Last Answer : (1) Uniform velocity, variable acceleration Explanation: Uniform circular motion occurs when a body moves in a circular path with constant velocity.
Description : A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to – (1) Outward pull on him (2) Inertia of motion (3) Change in momentum (4) Change in acceleration
Last Answer : (2) Inertia of motion Explanation: This is inertia of direction. It is the ability of body to be in a state of direction of motion for example sun holds planets in a fixed elliptical path .this ... at rest or moving with a constant velocity. It is the property possessed by a body to resist change.
Description : A particle is moving in a uniform circular motion with constant speed v along a circle of radius r. The acceleration-of the particle is – (1) zero (2) V/r (3) V/r² (4) V²/r
Last Answer : (4) V²/r Explanation: When a particle is moving in a uniform circular motion with constant speed and radius. the acceleration of the particle is given by v2/r. The particle will exhibit centripetal acceleration.
Description : A satellite moving round the earth with a uniform speed has------? A. An accelerated motion B. No acceleration at all C. Uniform acceleration (Answer) D. Uneven acceleration
Last Answer : C. Uniform acceleration (Answer)
Description : An object whose velocity is changing is said to be in a state of A. acceleration B. rest C. equilibrium D. Brownian motion
Last Answer : acceleration
Description : When ball having a projectile motion is rising up, it A. decelerates B. accelerates C. rises up with constant acceleration D. acceleration becomes zero
Last Answer : decelerates
Description : The maximum acceleration of a particle moving with simple harmonic motion is ____. A. ω B. ω.r C. ω / 2 π D. 2 π / ω
Last Answer : B. ω.r
Description : The vector representing acceleration on a vector diagram for a harmonic motion A) Lags the displacement vector by 90° B) Lags the displacement vector by 180° C) Leads the displacement vector by 90° D) Leads the displacement vector by 180°
Last Answer : C) Leads the displacement vector by 90°
Description : SHM is the motion in which acceleration of the body is proportional to its displacement and directed towards the mean position. A. True B. False C. Neither True Nor False D. None
Last Answer : A. True
Description : The maximum acceleration of a particle moving with simple harmonic motion is ____. (A) ω (B) ω.r (C) ω / 2 π (D) 2 π / ω
Last Answer : (B) ω.r
Description : Euler's equation of motion states, that at every point, the (A) Fluid momentum is constant (B) Force per unit mass equals acceleration (C) Rate of mass outflow is equal to the rate of mass inflow (D) None of these
Last Answer : (B) Force per unit mass equals acceleration
Description : In case of simple harmonic motion, displacement is proportional to the (A) Velocity (B) Acceleration (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : B) Acceleration
Description : A body which is attached to a spring undergoes simple harmonic motion. The magnitude of the body's acceleration is: w) constant x) proportional to its displacement from its equilibrium position y) zero z) always increasing.
Last Answer : ANSWER: X -- PROPORTIONAL TO ITS DISPLACEMENT FROM ITS EQUILIBRIUM POSITION
Description : In simple harmonic motion, the acceleration is: w) constant x) proportional to the distance from the central position y) greatest when the velocity is greatest z) none of the above
Last Answer : ANSWER: X -- PROPORTIONAL TO THE DISTANCE FROM THE CENTRAL POSITION
Description : Which of the following statements dealing with simple harmonic motion of a mass-spring system is TRUE? w) The acceleration is largest when the oscillating mass is instantaneously at rest. x) The ... of the motion. z) The acceleration is larger when the oscillating mass has its greatest velocity.
Last Answer : ANSWER: W -- THE ACCELERATION IS LARGEST WHEN THE OSCILLATING MASS IS INSTANTANEOUSLY AT REST
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 : The motion of a body around a circular path is an example of (1) Uniform velocity, variable acceleration (2) Uniform speed, uniform velocity (3) Uniform speed, variable velocity (4) Uniform speed, variable acceleration
Last Answer : Uniform velocity, variable acceleration
Description : A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to (1) Outward pull on him (2) Inertia of motion (3) Change in momentum (4) Change in acceleration
Last Answer : Inertia of motion
Description : a particle moves with uniform velocity. Which o fthe following statements about the motion of the particle is true. (a) its speed is zero. (b) its acceleration is zero. © its acceleration is opposite to the velocity. (d) its speed may be variable
Last Answer : Its acceleration is zero
Description : In what year did a scientist give proof of diurnal motion ?
Last Answer : French scientist Foucault , in 1751, gave evidence of ecliptic motion ?
Description : What Austrian scientist developed laws describing the motion on planets?
Description : What type of scientist studies motion?
Last Answer : Physicist
Description : Can anyone point to any article or paper, etc. where scientist or biologist have found a true bona fide homosexual animal?
Last Answer : answer:I haven't read through all of these papers in any detail, but these are scientific sources that discuss homosexual activity amongst animals. Rams. http://www.sciencedirect.com/science/ ... dolphins participating in homosexual behaviour but I can't find a scientific source, only news sources.
Description : When do you think online videos will have features of VHS videos: Pause at the exact place the first time, Slow Motion, etc?
Last Answer : And be able to come back to it later and start where you left off? Netflix can already do that, as can Hulu.
Description : How did the early scientists figure out all of these scientific facts (gravity, planetary motion, etc.) without the technology we have today, and how can we trust them?
Last Answer : answer:None of these discoveries were made in a vacuum. Oftentimes, new discoveries were made as replacements or responses to old lines of thinking that simply did not work or weren't true. And more ... not, people didn't trust the scientists at the time, but history has vindicated most of them.
Description : Froude number is significant in (A) Supersonics, as with projectile and jet propulsion (B) Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. (C) Simultaneous motion ... gravity forces, and wave making effect, as with ship's hulls (D) All of the above
Last Answer : Answer: Option C
Description : Reynolds number is significant in (A) Supersonics, as with projectile and jet propulsion (B) Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. (C) Simultaneous motion ... gravity forces, and wave making effect, as with ship's hulls (D) All of the above
Last Answer : Answer: Option B
Description : Mach number is significant in (A) Supersonics, as with projectiles and jet propulsion (B) Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. (C) Simultaneous motion through ... gravity force, and wave making effects, as with ship's hulls (D) All of the above
Last Answer : Answer: Option A
Description : Which one of the following statements best defines an estimate? a. An approximation of project time and cost targets, refined throughout the project life cycle. b. A prediction of a future ... . A situation that affects or influences the outcome of the project expressed in time or cost terms
Last Answer : a. An approximation of project time and cost targets, refined throughout the project life cycle.
Description : Which one of the following statements best defines an estimate? a. An approximation of project time and cost targets, refined throughout the project life cycle. b. A prediction of a future ... . A situation that affects or influences the outcome of the project expressed in time or cost terms.
Description : What is rational at any given time depends on? a) The performance measure that defines the criterion of success b) The agent’s prior knowledge of the environment c) The actions that the agent can perform d) All of the mentioned
Last Answer : d) All of the mentioned
Description : Which of the following correctly defines the main concept behind Conversion Optimization? a. Rapidly making significant changes to check which one possesses the fastest results b. Making insignificant ... result d. Frequently changing the website's layout to see if it appeals to more audience
Last Answer : b. Making insignificant incremental changes over time to check which one possesses the best results
Description : Which of the following statements defines density of population? (a) Number of persons living in per unit area. (b) Number of persons living in a country © Change in the number of inhabitants of a country during a specific period of time. (d) Absolute numbers added every year.
Last Answer : (a) Number of persons living in per unit area.