Work, Energy and Power-Kinetic Energy (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 1 - 2 of 2

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Question number: 1

» Work, Energy and Power » Kinetic Energy

MCQ▾

Question

A proton (mass 1.67 × 10-27 kg) is accelerated along a straight line by 4.3×1015ms2 . If the length covered is 4.0 cm and initial speed of proton was 3.2×107ms1 , the gain in kinetic energy is –

Choices

Choice (4) Response
a.

2.5 MeV

b.

1.3 MeV

c.

1.8 MeV

d.

3.4 MeV

Question number: 2

» Work, Energy and Power » Kinetic Energy

Appeared in Year: 2015

MCQ▾

Question

A 800 g ball is released from a height of 6 m. Each time it makes contact with the ground it loses 25 % of its energy. The K. E it passes after 3rd hit is –

Choices

Choice (4) Response
a.

18 J

b.

20.25 J

c.

28.25 J

d. Question does not provide sufficient data or is vague

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