NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 289 - 292 of 2184

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Question number: 289

» Kinematics » Uniform and Non-Uniform Motion

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MCQ▾

Question

An engine of mass 6 x 10 4 kg pulls a coach of mass 2 x 10 4 kg. Suppose that there is a resistance of 1 N per 100 kg acting on both coach and engine, and that the driving

Force of engine is 4800 N. The acceleration of the engine and tension in the coupling will respectively be

Choices

Choice (4) Response

a.

0.04 m/s 2, 20 N

b.

0.05 m/s 2, 1200 N

c.

400 m/s 2, 200 N

d.

0.09 m/s 2, 2000 N

Question number: 290

» Laws of Motion » Force and Inertia

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Question

A 5 kg balls is swing in a vertical circle at the end of a cord 1 m long. The maximum speed at which it can swing if the cord can sustain maximum tension of 150 N will be –

Choices

Choice (4) Response

a.

101 m/s

b.

36.5 m/s

c.

64 m/s

d.

3.18 m/s

Question number: 291

» Kinematics » Average Speed and Instantaneous Velocity

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Question

A train has to negotiate a curve of radius 400 m. By how much should the outer rail be raised with respect to inner rail for a speed of 48 km/hr. The distance between the rails is 1 m.

Choices

Choice (4) Response

a.

12 cm

b.

4.5 cm

c.

12 m

d.

4.5 m

Question number: 292

» Electrostatics » Coulomb's Law

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Question

Two small balls each having the charge + Q are suspended by insulating threads of length L from a hook. This arrangement is taken in space where there is no gravitational effect, then the angle between the two suspensions and the tension in each thread will be,

Choices

Choice (4) Response

a.

b.

c.

d.