Work, Energy and Power-Work Done [NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 7 - 11 of 32

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Question number: 7

» Work, Energy and Power » Work Done

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MCQ▾

Question

The work done in lifting water from a well of depth 6 m using a bucket of mass 0.4 kg and volume 2 liter, will be

Choices

Choice (4)Response

a.

98 J

b.

141.12 J

c.

73.5 J

d.

147 J

Question number: 8

» Work, Energy and Power » Work Done

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MCQ▾

Question

A man pushes a wall and fails to displace it. Choose incorrect statements related to his work

(1) Negative work

(2) Positive but not maximum work

(3) Maximum work

(4) No work at all

Select the correct answers and mark it according to the following codes:

Choices

Choice (4)Response

a.

1,2 and 3 are correct

b.

2 and 4 are correct

c.

1 and 3 are correct

d.

1 and 2 are correct

Question number: 9

» Work, Energy and Power » Work Done

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MCQ▾

Question

An object of mass 5 kg falls from rest through a vertical distance of 20 m and reaches a velocity of 10 m/s. How much work is done by the push of the air on the object? (g = 10 m/s 2).

Choices

Choice (4)Response

a.

300 J

b.

750 J

c.

200 J

d.

350 J

Question number: 10

» Work, Energy and Power » Work Done

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MCQ▾

Question

A chain of linear density 3 kg/m and length 8 m is lying on the table with 2 m of chain hanging from the edge. The work done in lifting the chain on the table will be –

Choices

Choice (4)Response

a.

4.8 J

b.

17.6 J

c.

1.6 J

d.

5.2 J

Question number: 11

» Work, Energy and Power » Work Done

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MCQ▾

Question

A chain of linear density 3 kg/m and length 8 m is lying on the table with 4 m of chain hanging from the edge. The work done in lifting the chain on the table will be –

Choices

Choice (4)Response

a.

98 J

b.

235.2 J

c.

196 J

d.

117.6 J

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