Kinematics-Average Speed and Instantaneous Velocity [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 65 - 69 of 143

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Question 65

Question Assertion-Reason▾

Assertion(Ꭺ)

Rain is falling vertically downwards with velocity 6 km/h. A man walks with a velocity of 8 km/h. Relative velocity of rain w. r. t. the man is 10 km/h.

Reason(Ꭱ)

Relative velocity is the ratio of two|velocities.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are false

Edit

Question 66

Question MCQ▾

A body of mass 0.05 kg falls from a height of 5 meter into a pile of sand. The body penetrates the sand a distance of 5 cm before stopping. What force has the sand exerted on the body?

Choices

Choice (4)Response

a.

-196 N

b.

- 19.6 N

c.

-49 N

d.

0.196 N

Edit

Question 67

Question MCQ▾

A car of 1000 kg moving with a velocity of 18 km/hr is stopped by the brake force of 1000 N. The distance covered by it before coming to rest is –

Choices

Choice (4)Response

a.

12.5 m

b.

144 m

c.

1 m

d.

162 m

Edit

Question 68

Question MCQ▾

A body of mass 20 kg moving with a velocity of 3 m/s, rebounds on a wall with same velocity. The impulse on the body is -

Choices

Choice (4)Response

a.

30 Ns

b.

120 Ns

c.

60 Ns

d.

180 Ns

Edit

Question 69

Question MCQ▾

A ship is steaming towards east at a speed of 12 ms-1 . A woman runs across the deck at a speed of 5 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.

5 m/s

b.

17 m/s

c.

13 m/s

d.

12 m/s

Edit