Law of Motion MCQ question and answer with solution

31

When a running car stops suddenly, the passengers tends to lean forward because of

A) centrifugal force B) inertia of rest C) inertia of motion D) gravitational force

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Answer & Solution

Answer: Option C

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32

A body of mass 4 kg accelerates from 15 m/s to 25 m/s in 5 seconds due to the application of a force on it. Calculate the magnitude of this force (in N).

A) 32 B) 8 C) 16 D) 64

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Answer & Solution

Answer: Option B

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33

When the cardboard placed on the glass tumbler is flicked away with a finger a coin placed on it fall in the glass.
Which law defines the above statement-

A) Principle of conservation of energy B) Law of inertia C) Newton's third law of motion D) Principle of conservation of momentum

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Answer & Solution

Answer: Option B

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34

Consider the following statements.
1. Centrifugal force is exerted by a cream separator machine of the milk.
2. A horse suddenly moves then it is a fear to fall down the horse rider because of inertia of rest.
3. The bodies executing free falling motion have equal momentum.
Which of the statement given above is correct?

A) 1, 2 and 3 B) 1 andv 2 C) 3 and 2 D) Only 1

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Answer & Solution

Answer: Option B

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35

A force of 350 N is applied to a mass of 500 kg. In this case what will be the acceleration generated in the object?

A) 0.7ms² B) 0.7ms^-2 C) 0.7ms¹ D) 0.7ms^-1

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Answer & Solution

Answer: Option B

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36

The Second Law of Motion states that

A) Every object will move in a uniform motion when a net force is applied B) The rate of change of momentum of an object is proportional to the net force applied on the object in the direction of net force C) Every object will remain at rest or in a state of uniform motion unless compelled to change its state by the action of a net force D) The rate of change of speed of a body will change with the net force applied

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Answer & Solution

Answer: Option B

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37

Meaning of retardation is . . . . . . . . acceleration.

A) negative B) positive C) All of the above options D) Zero

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Answer & Solution

Answer: Option A

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38

In the equation of motion v = u + at, u represents . . . . . . . .

A) initial velocity B) final velocity C) kinetic energy D) potential energy

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Answer & Solution

Answer: Option A

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39

An object of mass 150 kg is accelerated in 5 seconds with a velocity of 6 ms^-1 to 16 ms^-1. Find the acceleration.

A) 10 ms^-2 B) -2 ms^-2 C) 2 ms^-2 D) -10 ms^-2

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Answer & Solution

Answer: Option C

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40

What is rate of change of position of an object with respect to a frame of reference, which is a function of time called?

A) mechanics B) vector C) velocity D) magnitude

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Answer & Solution

Answer: Option C

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