Laws of Motion Test

Result

Laws of Motion Test - 30

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

A cold soft drink is kept on the balance.When the cap is open, then the weight

A
Increases

B
Decreases

C
First increase then decreases

D
Remains same
Question 2
4 / -1

A wagon weighing 1000 kg is moving with a velocity 50 km h^–1 on smooth horizontal rails. A mass of 250 kg is dropped into it. The velocity with which it moves now is

A
.5 km h^–1

B
20 km h^–1

C
40 km h^–1

D
50 km h^–1

Solution
Question 3
4 / -1

The Figure shows the Position-time (x-t) graph of one dimensional motion of a body of mass 0.4 kg. The magnitude of each impluse is

A
0.2 Ns

B
0.4 Ns

C
0.8 Ns

D
1.6 Ns

Solution
Question 4
4 / -1

A

B

C

D
Question 5
4 / -1

A

B
29 N

C
26 N

D

Solution
Question 6
4 / -1

A particle of mass 2 kg is initially at rest. A force acts on it whose magnitude changes with time. The force time graph is shown below.

A
10 ms^–1

B
20 ms^–1

C
75 ms^–1

D
50 ms^–1

Solution
Question 7
4 / -1

A
32 N

B
4 N

C
2 N

D
8 N

Solution
Question 8
4 / -1

A
5

B
4

C
3

D
2

Solution
Question 9
4 / -1

A car travelling at a speed of 30 km/h is brought to a halt in 8 metres by applying brakes. If the same car is travelling at 60 km/h it can be brought to a halt with the same breaking power in

A
8 m

B
16 m

C
24 m

D
32 m

Solution
Question 10
4 / -1

A given object takes n times more time to slide down 45^o rough inclined plane as it takes to slide down a perfactly smooth 45^o incline. The coefficient of kinetic friction between the object and the incline is

A

B

C

D

Solution