NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 902 - 906 of 2184

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Question number: 902

» Work, Energy and Power » Work Done

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MCQ▾

Question

A uniform chain is held on a frictionless table with one-fifth of its length hanging over the edge. If the chain has a length l and a mass m, how much work is required to pull the hanging part back on the table?

Choices

Choice (4) Response

a.

mg l/5

b.

mg l /50

c.

mg l /2

d.

mg l /10

Question number: 903

» Work, Energy and Power » Power

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Question

A bus of mass 1000 kg has an engine which produces a constant power of 50 kW. If the resistance to motion, assumed constant is 1000 N. The maximum speed at which the bus can travel on level road and the acceleration when it is travelling at 25 m/s, will respectively be –

Choices

Choice (4) Response

a.

1.0 m/s, 50 m/s 2

b.

50 m/s, 1.0 m/s 2

c.

5.0 m/s, 10 m/s 2

d.

10 m/s, 5m/s 2

Question number: 904

» Laws of Motion » Force and Inertia

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Question

In the above question, if at the end of 4 sec, the string be cut, the position of each particle in next 2 seconds will respectively be -

Choices

Choice (4) Response

a.

-17.856 m, 21.344 m

b.

-21.344 m, 17.856 m

c.

-17.856 m, -21.344 m

d.

17.856 m, 21.344 m

Question number: 905

» Work, Energy and Power » Work-Energy Theorem

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Question

The stopping distance for a vehicle of mass M moving with a speed v along a level road, will be - (u is the coefficient of friction between tyres and the road)

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 906

» Work, Energy and Power » Work Done

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MCQ▾

Question

A force F = (9 - 4x + 6x 2) N is applied on a 2 kg mass which displaces it from x = 0 to x = 5 m. Work done in joule is -

Choices

Choice (4) Response

a.

135

b.

270

c.

245

d.

70