Kinematics [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 153 - 156 of 475

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Question 153

Question MCQ▾

A ship is steaming towards east at a speed of 10 ms-1 . A woman runs across the deck at a speed of 8 ms-1 in the direction at right angles to the direction of motion of the ship i.e.. towards north. What is the velocity of the woman relative to sea?

Choices

Choice (4)Response

a.

11.64 m/s

b.

12.806 m/s

c.

17 m/s

d.

17.506 m/s

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Question 154

Question MCQ▾

An engine of mass 6 × 104 kg pulls a coach of mass 2 × 104 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/s2 , 20 N

b.

0.05 m/s2 , 1200 N

c.

400 m/s2 , 200 N

d.

0.09 m/s2 , 2000 N

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Question 155

Question MCQ▾

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

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Question 156

Question MCQ▾

The total mass of an elevator with a 50 kg man in it is 500 kg. This elevator moving upward with a speed of 8 m/sec, is brought to rest over a distance of 16m. The tension T in the cables supporting the elevator and the force exerted on the man by the elevator floor will respectively be

Choices

Choice (4)Response

a.

620 N, 7800 N

b.

7800 N, 390 N

c.

624 N, 3900 N

d.

3900 N, 390 N

Edit