Kinematics-Average Speed and Instantaneous Velocity (NEET Physics): Questions 18 - 21 of 108

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Question number: 18

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A ball is projeced from O with an initial velocity 700 cm/s in a direction 37° above the horizontal. A ball B, 500 cml away from O on the line of the initial velocity of A, isl released from rest at the instant A is projected. The height! through which B falls, before it is hit by A and the directionl of the velocity A at the time of impact will respectively bel [given g = 10 m/s2, sin 37° = 0.6 and cos 37° = 8.0]

Choices

Choice (4) Response

a.

245 cm, 20° 44

b.

300 cm, 27° 43

c.

255 cm, 27° 43

d.

250 cm, 28° 42

Question number: 19

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A projectile thrown from a height of 10 m with velocity of √2 m/s, the projectile will fall, from the foot of projection, at distance- (g = 10 m/s 2)

Choices

Choice (4) Response

a.

1 m

b.

3 m

c.

√2 m

d.

2 m

Question number: 20

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A ball is thrown from ground level so as to just clear a wall 4 metres high at a distance of 4 metres and falls at a distance of 14 metres from the wall. The magnitude of velocity on the ball will be

Choices

Choice (4) Response

a.

√l82 m/s

b.

√181 m/s

c.

√186 m/s

d.

√185 m/s

Question number: 21

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

A body of mass 4 kg lying on a smooth surface is attached to a string 6 m long and then whirled round in a horizontal circle making 60 revolution per minute. The centripetal acceleration will be

Choices

Choice (4) Response

a.

23.68 m/s 2

b.

236.6 m/s 2

c.

1.18 m/s 2

d.

2.368 m/s 2

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