Work, Energy and Power MCQ question and answer with solution

51

Momentum = . . . . . . . .

A) mass × velocity B) mass/volume C) mass × density D) mass × acceleration

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

52

If the weight of an object is 200 N, find its mass. (g = 10 ms^-2)

A) 20 N B) 20 W C) 20 Pa D) 20 kg

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

53

The example of the conservative force is

A) friction force B) gravitational force C) viscous fore D) None of these

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

54

Which of the following equations calculates momentum?

A) momentum = mass/volume B) momentum = mass × velocity C) momentum = mass × acceleration D) momentum = mass × volume

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

55

Flying a rocket can be understood by . . . . . . . .

A) Energy-conservation law B) Momentum-conservation law C) First law of motion D) Second law of motion

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

56

20 N force is acting on a body. Body moves 4 meter in direction of applied force, then work done is-

A) 80W B) 80Pa C) 80N D) 80J

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

57

What can be predicted with respect to the energy in the given figure?
Work, Energy and Power mcq question image

A) Both vehicles have gravitational potential energy B) Both vehicles are moving in forward direction using maximum energy C) Both vehicles are converting mechanical energy into musculer energy D) Both vehicles have kinetic energy

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

58

Assertion (A) Work done by friction on a body sliding down an inclined plane is positive.
Reason (R) Work done is greater than zero it the angle between force and displacement is acute.

A) Both A and R are true and R is the correct explanation of A B) Both A and R are true, but R is not the correct explanation of A C) A is true, but R is false D) A is false, but R is true

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

59

The product of force and displacement is called-

A) Momentum B) Acceleration C) Work D) Burden

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

60

When the hammer of 15kg is raised to a height of 10m, find the potential energy obtained by it?

A) 1500J B) -150J C) -1500J D) 150J

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Work, Energy and Power MCQ question and answer with solution | Physics Gk MCQs