Law of Motion MCQ question and answer with solution

41

What does the slope of velocity-time graph represent?

A) distance B) momentum C) acceleration D) force

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Answer & Solution

Answer: Option C

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42

The following figure represents the velocity-time graph of a moving car on a road.
Law of Motion mcq question image

Which segment of the graph represents the retardation?

A) AB B) BC C) CD D) None of these

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Answer & Solution

Answer: Option B

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43

When a body is moving on a surface, the force of friction is called

A) static friction B) dynamic friction C) limiting friction D) rolling friction

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Answer & Solution

Answer: Option B

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44

Which scientist gave 'Laws of motion'?

A) Galileo B) Newton C) Einstein D) Boyle

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Answer & Solution

Answer: Option B

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45

A stone tied to a string is whirled in a circular path. As it was revolving, the rope suddenly snaps. Then

A) the stone flies off tangentially B) the stone moves radially outward C) the stone moves radially inward D) None of the above

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Answer: Option A

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46

The equation F = ma, is given by Newton's . . . . . . . . law of motion:

A) II B) III C) I D) IV

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Answer & Solution

Answer: Option A

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47

Why does a cannon recoil after firing?

A) Conservation of energy B) Backward thrust of gases produced C) Newton's Third Law of Motion D) Newton's First Law of Motion

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Answer & Solution

Answer: Option C

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48

The second law of motion shows-

A) Every object will remain in a state of constant or uniform motion, unless it is forced to change its state by the action of pure force B) When pure force is applied, each object will move in the same speed C) The rate of change in the speed of the object will change with the applied net force D) The rate of change of momentum of an object is proportional to the net force applied to the object in the direction of net force

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Answer: Option D

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49

A ball P is dropped vertically and another ball Q is thrown horizontally with the same velocities from the same height and at the same time. If air resistance is neglected, then

A) ball P reaches the ground first B) ball Q reaches the ground first C) both reach the ground at the same time D) the respective masses of the two balls will decide the time

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Answer: Option C

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50

Which one of the following is not a contact force?

A) Push force B) Gravitational force C) Frictional force D) Strain force

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Answer & Solution

Answer: Option B

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Law of Motion MCQ question and answer with solution | Physics Gk MCQs