Miscellaneous Test

Result

Miscellaneous Test - 75

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Question 1
4 / -1

To a man running at a speed of 20 km/hr. the rain drops appear to be falling at an angle of 30^oC from the vertical. If the rain drops are actually falling vertically downwards, their velocity in km/hr is

A
10√3

B
10

C
20√3

D
40

Solution
Question 2
4 / -1

A body is moving in a straight line with uniform acceleration. it covers distances of 10 m and 12 m in third and fourth seconds respectively. Then the initial velocity in m/sec is

A
2

B
3

C
4

D
5

Solution
Question 3
4 / -1

A stone is dropped from a certain height which can reach the ground in 5 sec. If the stone is stopped after 3 seconds of its fall and then time taken by the stone to reach the ground for the remaining distance is

A
2 seconds

B
3 seconds

C
4 seconds

D
None of these

Solution
Question 4
4 / -1

A man in a balloon, rising vertically with an acceleration of 4.9 m/sec² release a ball 2 seconds after the balloon is let go from the ground. The greatest height above the ground reached by the ball is

A
14.7 m

B
19.6 m

C
9.8 m

D
24.5

Solution
Question 5
4 / -1

A hockey stick pushes a ball at rest for 0.01 second with an average force of 50 N. lithe ball weighs 0.2 kg, then the velocity of the ball just after being pushed is

A
3.5 m/sec

B
2.5 m/sec

C
1.5 m/sec

D
4.5 m/sec

Solution
Question 6
4 / -1

A man falls vertically under gravity with a box of mass on his head. Then the reaction force between his head and the box is

A
mg

B
2 mg

C
0

D
1.5 mg

Solution
Question 7
4 / -1

A man of mass 80 kg is travelling in a lift. The reaction between the floor of the lift and the man when the lift is ascending upwards at 4 m/sec² is

A
1464.8 N

B
1784.8 N

C
1959.8 N

D
1104.8 N

Solution
Question 8
4 / -1

A ball is dropped from a height h on a horizontal plane and the coefficient of restitution for the impact is e, the velocity with which the ball rebounds from the floor is

A

B

C

D

Solution
Question 9
4 / -1

A gun projects a ball at an angle of 450 with the horizontal. If the horizontal range is 39.2 m, then the ball will rise to

A
9.8m

B
4.9m

C
2.45 m

D
19.6 m

Solution
Question 10
4 / -1

If the range of any projectile is the distance equal to the height from which a particle attains the velocity equal to the velocity of projection, then the angle of projection will be

A
60°

B
75^o

C
36°

D
30°

Solution