Kinematics (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 7 - 10 of 13

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Question number: 7

» Kinematics » Motion in a Straight Line

MCQ▾

Question

A rocket is fired upward from the earth’s surface such that it creates an acceleration of. If after 10 s, its engine is switched off, the maximum height of the rocket from earth’s surface would be – (Assume gravitation field is uniform)

Choices

Choice (4) Response

a.

2860 m

b.

3050 m

c.

2000 m

d.

2980 m

Question number: 8

» Kinematics » Motion in a Straight Line

MCQ▾

Question

A 1.5 kg object travelling with uniform acceleration covers 16 m in 4th second and 20 m in 5th second. Which of the following is correct?

Choices

Choice (4) Response

a.

The force on the object is 6N.

b.

The initial velocity of the object is 2 ms-1

c.

The acceleration of the object is 4 ms-2.

d.

All a. , b. and c. are correct

Question number: 9

» Kinematics » Relative Velocity

MCQ▾

Question

A cart is moving along x direction with a velocity of 3 ms-1. A person on the cart throws a stone with a velocity of 8 ms-1 relative to himself. In the frame of reference of the cart the stone is thrown in plane making an angle of 600 with vertical y axis. The speed of stone at highest point of the trajectory the stone is –

Choices

Choice (4) Response

a.

2 ms-1

b.

5 ms-1

c.

4 ms-1

d.

2.5 ms-1

Question number: 10

» Kinematics » Motion in a Straight Line

Appeared in Year: 2015

MCQ▾

Question

A boy is standing on top of a tower of height 85 m and throws a ball in the vertically upward direction with a certain speed. If 5.25 seconds later he hears the ball hitting the ground, then the speed with which the boy threw the ball is (take, speed of sound in air )

Choices

Choice (4) Response

a.

b.

c.

d.

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