Past Papers of MDCAT ECAT Physics, Work and Energy Test 2

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Question 1: If velocity is double, then.

A) Momentum increase 4 times and K.E increases 2 times

B) Momentum increases 2 times and K.E increase constant

C) Momentum and K.E remain same

D) Momentum increases 2 times and K.E increases 4 times

Explanation: Scroll down after completing the quiz to view the detailed explanation for this question.

Question 2: The heat energy dissipated by 40 watts also in one hour is

A) 1440 J

B) 14400 J

C) 144000 J

D) 1440000 J

Explanation: Scroll down after completing the quiz to view the detailed explanation for this question.

Question 3: The gravitational potential energy per unit mass is called:

A) Gravitational potential

B) Absolute P.E

C) P.E

D) Potential hill

Explanation: Scroll down after completing the quiz to view the detailed explanation for this question.

Question 4: A 6.0 kg block is released from rest 80m above the ground. When it has fallen 60m its kinetic energy is approximately:

A) 4800 J

B) 3500 J

C) 1200 J

D) 120 J

Explanation: Scroll down after completing the quiz to view the detailed explanation for this question.

Question 5: Potential energy per unit volume is given by

A) mgh

B) gh

C) mgh/ρ

D) ρgh

Explanation: Scroll down after completing the quiz to view the detailed explanation for this question.

Question 6: Work done will be zero if the angle between force and displacement is:

A) 0°

B) 270°

C) 60°

D) 360°

Explanation: Scroll down after completing the quiz to view the detailed explanation for this question.

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