Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : A stone tied with a piece of thread describing a circular path with constant velocity on being released moves in a straight line.
Reason : Along the circular path direction of motion remains the same at every point.
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : When the displacement of a body is directly proportional to the square of the time. Then the body is moving with uniform acceleration.
Reason : The slope of velocity-time graph with time axis gives acceleration.
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion: An object can have constant speed but variable velocity.
Reason: Speed is a scalar but velocity is a vector quantity.
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : The displacement of an object can be either positive, negative or zero.
Reason : Displacement has both the magnitude and direction.
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : A boy riding on bicycle in a crowded street exhibit non uniform motion.
Reason : The boy covers equal distance in equal interval of time.
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : If a particle is moving with constant velocity, then average velocity for any time interval is equal to instantaneous velocity.
Reason : If average velocity of a particle moving on a straight line is zero for a given time interval, then instantaneous velocity at some instant within this interval may be zero.
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : Displacement for a course of motion may be zero but the corresponding distance covered is not zero.
Reason : Displacement and distance covered may not always equal.
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : Motion with uniform velocity is always along a straight line path.
Reason : In uniform velocity a motion, speed is the magnitude of the velocity and is equal to the instantaneous velocity
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : A tiger can accelerate from rest at the rate of 4 m/s2.
Reason : The velocity attained by it in 10 s is 40 m/s.
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : An object may have acceleration even if it is moving with uniform velocity.
Reason : An object may be moving with uniform velocity but it may be changing its direction of motion.
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : Motion of satellites around their planets is considered an accelerated motion.
Reason : During their motion, the speed remains constant, while the direction of motion changes continuously.
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : The speedometer of a car measures the instantaneous speed of the car.
Reason : Average speed is equal to the total distance covered by an object divided by the total time taken.
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : Weight of an object is the force with which a body is attracted towards the earth.
Reason : Its direction is vertically upward.
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : Velocity versus time graph of a particle in uniform motion along a straight path is a line parallel to the time axis.
Reason : In uniform motion the velocity of a particle increases as the square of the time elapsed
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : Displacement of an object may be zero even if the distance covered by it is not zero.
Reason : Displacement is the shortest distance between the initial and final position.