KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 167 - 171 of 253

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Question number: 167

» Kinematics » Projectile Motion

MCQ▾

Question

The maximum height attained by a projectile is increased by 15 % by increasing its speed of projection, without changing the angle of projection. The percentage increase in the horizontal range will be –

Choices

Choice (4) Response

a.

20 %

b.

10%

c.

15%

d.

5%

Question number: 168

» Work, Energy and Power » Work-Energy Theorem

MCQ▾

Question

The displacement x of a particle moving in one dimension, under the action of a constant force is related to time t by the equation:

Where, x is in meter and t is sec. The work done by the force in first 4 sec is –

Choices

Choice (4) Response

a.

6 J

b.

4 J

c.

8 J

d.

0

Question number: 169

» Kinematics » Relative Velocity

MCQ▾

Question

A boat crossing a river moves with a velocity v relative to still water. The river is flowing with a velocity with respect to the bank. The angle with respect to the flow direction with which the boat should move to minimize the drift is–

Choices

Choice (4) Response

a.

1350

b.

600

c.

300

d.

1200

Question number: 170

» Kinematics » Frame of Reference

MCQ▾

Question

A train Y of 400 meter length travelling at 75 km/hr overtakes another train X of 200 meter length travelling at 50 km/hr velocity in the same direction. The time train Y takes to completely pass train X –

Choices

Choice (4) Response

a.

76.32 sec

b.

22.5 sec

c.

86.4 sec

d.

108.3 sec

Question number: 171

» Laws of Motion » Static and Kinetic Friction

MCQ▾

Question

Mark the correct statements:

Select the correct option:

(1) Coefficient of static friction is always greater than that of kinetic friction.

(2) Limiting friction is always greater than the kinetic friction.

(3) Limiting friction can never be less than static friction.

(4) Static friction is always greater than the kinetic friction.

Choices

Choice (4) Response

a.

(1), (2) and (3) are correct

b.

(1) and (3) are correct

c.

(2) and (4) are correct

d.

(2) and (3) are correct

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