Work, Energy and Power-Kinetic Energy (KVPY Stream-SA (Class 11) Physics): Questions 1 - 5 of 5

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Question number: 1

» Work, Energy and Power » Kinetic Energy

Appeared in Year: 2012

MCQ▾

Question

A clay ball of mass m and speed v strikes another metal ball of same mass m, which is at rest. They stick together after collision. The kinetic energy of the system after collision is:

Choices

Choice (4) Response
a.

mv2

b.

2mv2

c.

mv22

d.

mv24

Question number: 2

» Work, Energy and Power » Kinetic Energy

MCQ▾

Question

A ball of mass 5 kg is in motion and has a momentum 25 kg-m/s. A force of 0.8 N acts on it along the direction of the motion for 20 s. The increase in its kinetic energy is,

Choices

Choice (4) Response
a.

118.5 J

b.

105.6 J

c.

91.5 J

d.

127 J

Question number: 3

» Work, Energy and Power » Kinetic Energy

MCQ▾

Question

A ball whose kinetic energy is E, is thrown at an angle of 300 with the horizontal. Its kinetic energy at the highest point of its trajectory will be,

Choices

Choice (4) Response
a.

E2

b.

3E4

c.

3E

d.

E3

Question number: 4

» Work, Energy and Power » Kinetic Energy

MCQ▾

Question

A ball whose kinetic energy is E, is thrown at an angle of 600 with the horizontal. Its kinetic energy at the highest point of its trajectory will be,

Choices

Choice (4) Response
a.

E

b.

0

c.

E4

d.

E2

Question number: 5

» Work, Energy and Power » Kinetic Energy

MCQ▾

Question

A ball of mass 3 kg is in motion and has a momentum 15 kg-m/s. A force of 0.6 N acts on it along the direction of the motion for 15 s. The increase in its kinetic energy is,

Choices

Choice (4) Response
a.

27 J

b.

81 J

c.

9 J

d.

58.5 J

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