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11. The force between the two objects is always equal and opposite . Which Newton’s law gives idea about the statement ________.
A. Third law of motion
B. Second law of motion
C. First and second law of motion
D. First law of motion
ANSWER:A
SOLUTION :Newton’s third law of motion states that for every action, there is an equal and opposite reaction. This means that if object A exerts a force on object B, then object B will exert an equal and opposite force on object A. These forces do not cancel out because they act on two different objects.
12. Change in velocity / time taken =
A. Impulse
B. Speed
C. Acceleration
D. Displacement
ANSWER:C
SOLUTION:The change in velocity of a body with time is called acceleration. It is given by the ratio of the change in the body’s velocity to time.
13. The tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called _______.
A. Velocity
B. Force
C. Momentum
D. Inertia
ANSWER:D
SOLUTION:The tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called inertia.
14. Conservation of momentum in a collision between particles can be understood on the basis of _______.
A. Newton’s First Law of Motion
B. Newton’s Second Law of Motion
C. Both Newton’s Second Law of Motion and Newton’s Third Law of Motion
D. Conservation of Energy
ANSWER:C
SOLUTION:The conservation of momentum in a collision between particles can be understood from both Newton’s second and third laws of motion.
15. The velocity of an object is proportional to the time elapsed . The object has ________.
A. Uneven acceleration
B. Uniform acceleration
C. Uniform speed
D. Uneven speed
ANSWER:B
SOLUTION:As free fall is example of uniform accelerated motion so, The velocity of an object is directly proportional to the time elapsed. The object has uniform acceleration.
16. For a body moving with uniform acceleration its final velocity equals _______.
A. Average velocity – initial velocity
B. 2 × average velocity – initial velocity
C. 2 × average velocity + initial velocity
D. Average velocity + initial velocity
ANSWER:B
SOLUTION :2 × Average velocity – initial velocity
17. Acceleration of an object moving at uniform velocity is _______.
A. Unequal
B. Positive
C. Negative
D. Zero
ANSWER:D
SOLUTION:The acceleration of an object moving at uniform velocity is zero. Acceleration is the rate of change in velocity per unit time. When velocity does not change with respect to time, the rate of change of velocity is zero, and therefore the acceleration is zero.
18. During ________ motion of an object along a straight line, the change in velocity of the object for any time interval is zero.
A. Linear
B. Translational
C. Equilibrium
D. Uniform
ANSWER:D
SOLUTION: During the uniform motion of an object along a straight line, the change in velocity of the object for any time interval is zero and remains constant with time. In this case, the acceleration would also be equal to zero.
19. The speed of a particle or any instant of time is called its _______.
A. Instantaneous speed
B. Instantaneous velocity
C. Displacement
D. None of the above
ANSWER:A
SOLUTION: The speed of a particle at any instant of time is called its instantaneous speed. It’s a scalar quantity, and for uniform motion, it’s constant. Instantaneous speed is the magnitude of the particle’s instantaneous velocity at that specific time.
20. The famous law of motion is given by ______.
A. Dalton
B. Newton
C. Galileo
D. Thomson
ANSWER:B
SOLUTION: Newton’s laws of motion are three physical laws that describe the relationship between the motion of an object and the forces acting on it.