Laws of Motion Test

Result

Laws of Motion Test - 50

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

When the speed of a moving body is doubled

A
Its acceleration is doubled

B
Its momentum is doubled

C
Its kinetic energy is doubled

D
Its potential energy is doubled
Question 2
4 / -1

A force of 100 dyne acts on a mass of 5 g for 10 s. Thevelocity produced is

A
2000 cm/s

B
200 cm/s

C
20 cm/s

D
2 cm/s

Solution
Question 3
4 / -1

A boy having a mass equal to 50 kilograms is standing in an elevator. The force felt by the feet of the boy will be greatest when the elevator(g=9.8m/s²)

A
Stands still

B
Moves downward at a constant velocity of 4 m/s

C
Accelerates downward with an acceleration equal to 4 m/s²

D
Accelerates upward with an acceleration equal to 4 m/s²
Question 4
4 / -1

There is a simple pendulum hanging from the ceiling of a lift. When the lift is stand still, the time period of the pendulum is T. If the resultant acceleration becomes g / 4, then the new time period of the pendulum is

A
0.8 T

B
0.25 T

C
2 T

D
4 T

Solution
Question 5
4 / -1

The ratio of the weight of a man in a stationary lift and when it is moving downward with uniform acceleration \'a \' is 3 : 2. The value of \'a\' is (g-Acceleration due to gravity of the Earth)

A

B

C

D

Solution
Question 6
4 / -1

The spring balance inside a lift suspends an object. As the lift begins to ascend, the reading indicated by thespring balance will

A
Increase

B
Decrease

C
Remain unchanged

D
Depend on the speed of ascend

Solution
Question 7
4 / -1

In an elevator moving vertically up with an acceleration g, the force exerted on the floor by a passenger of mass M is

A
Mg

B
1/2Mg

C
Zero

D
2 Mg

Solution
Question 8
4 / -1

A mass 1 kg is suspended by a thread it is
(i) lifted up with an acceleration 4.9 m/s²
(ii) lowered with an acceleration 4.9 m/s².
The ratio of the tensions is

A
3 : 1

B
1 : 3

C
1 : 2

D
2 : 1

Solution
Question 9
4 / -1

The time in which a force of 2 N produces a change in momentum of 0.4 kg ms^–1 in the body is

A
0.2 s

B
0.02 s

C
0.5 s

D
0.05 s

Solution
Question 10
4 / -1

A cork is submerged in water by a spring attached to the bottom of a pail. When the pail is kept in a elevator moving with an acceleration downwards, the spring length

A
Increases

B
Decreases

C
Remains unchanged

D
Data insufficient

Solution