Kinematics (KVPY Stream-SA (Class 11) Physics): Questions 11 - 15 of 21

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Question number: 11

» Kinematics » Relative Velocity

MCQ▾

Question

A thief is running away on a straight road with velocity 3 m/s. A policeman chases him with velocity 3.5 m/s. Initially the thief was 250 m ahead of the policeman. The time taken by policeman to catch the thief is –

Choices

Choice (4) Response
a.

9 min

b.

7 min 15 sec

c.

7 min 50 sec

d.

8 min 20 sec

Question number: 12

» Kinematics » Relative Velocity

MCQ▾

Question

A train of length l (165 m) is going towards north directional constant speed v1=12 m/s. A parrot flies at a constant speed of v2 = 3 m/s towards south parallel to be railway track. The time taken by the parrot to cross the train is –

Choices

Choice (4) Response
a.

15 s

b.

18 s

c.

11 s

d.

9 s

Question number: 13

» 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: 14

» 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 v2 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: 15

» 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

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