KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 148 - 151 of 253

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Question number: 148

» Center of Mass » Centre of Mass of a Rigid Body

MCQ▾

Question

A hollow tilted cylindrical vessel of negligible mass rest is on a horizontal plane as shown. The diameter of the base is a and the side of the cylinder makes an angle θ with the horizontal. Water is then slowly poured into the cylinder. The cylinder topples over when the water reaches a certain height h, given by,

A hollow tilted cylindrical vessel

A Hollow Tilted Cylindrical Vessel

In figure a hollow tilted cylindrical vessel is shown. The diameter of the base is a and the side of the cylinder makes an angle θ with the horizontal.

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 149

» Properties of Solids & Liquids » Terminal Velocity

MCQ▾

Question

Two equal drops of rain falling in air with a constant velocity of 20 cm/sec. The drops mixed up and form a single drop, what would be their terminal velocity (in cm/sec)?

Choices

Choice (4) Response

a.

71.74

b.

15.87

c.

25.25

d.

31.74

Question number: 150

» Work, Energy and Power » Power

MCQ▾

Question

A boy of weight 50 kg climbs up a staircase carrying 15 kg load on his head. The staircase has 35 steps and each step has a height of 15 cm. If he takes 20 seconds to climb, calculate the power developed by him. (g = 9.8 ms-2)

Choices

Choice (4) Response

a.

167.21

b.

323.3

c.

527.5

d.

95.32

Question number: 151

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

Question

A massless platform of hard paper is kept on a light elastic spring as figure shows. When a particle of mass 500 g is dropped on the platform from a height of 0.32 m, the particle strikes the platform and compresses the spring by 0.05 m. From what height the particle is dropped to get a compression of 0.08 m?

A platform attached on the spring

A Platform Attached on the Spring

In figure a platform of hard paper is attached on the spring. And a particle of mass 500 gm is dropped from height 0.32 m.

Choices

Choice (4) Response

a.

0.78

b.

0.68

c.

0.86

d.

0.70

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