Laws of Motion Test

Result

Laws of Motion Test - 73

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Weekly Quiz Competition

Question 1
4 / -1

A bird weighs 2 kg and is inside a closed cage of 1 kg. If it starts flying, then what is the weight of the bird and cage assembly

A
1.5 kg

B
2.5 kg

C
3 kg

D
4 kg
Question 2
4 / -1

A man is standing on a balance and his weight is measured. If he takes a step in the left side, then weight

A
Will decrease

B
Will increase

C
Remains same

D
First decreases then increases
Question 3
4 / -1

A man is standing at a spring platform. Reading of spring balance is 60 kg wt. If man jumps outside platform, then reading of spring balance

A
First increases then decreases to zero

B
Decreases

C
Increases

D
Remains same
Question 4
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 increases then decreases

D
Remains same
Question 5
4 / -1

A bird is sitting in a large closed cage which is placed on a spring balance. It records a weight of 25 N. The bird (mass m = 0.5 kg) flies upward in the cage with an acceleration of 2 m/s². The spring balance will now record a weight of

A
24 N

B
25 N

C
26 N

D
27 N

Solution
Question 6
4 / -1

A book is lying on the table. What is the angle between the action of the book on the table and the reaction of the table on the book

A
0°

B
30°

C
45°

D
180°
Question 7
4 / -1

In an air collision between an aeroplane and a bird, the force experienced by the bird as compared to that of the aeroplane is

A
Very high

B
Equal

C
Less

D
Zero
Question 8
4 / -1

An explosion blows a rock into three parts. Two parts go off at right angles to each other. These two are, 1 kg first part moving with a velocity of 12 ms^–1 and 2 kgsecond part moving with a velocity of 8 ms^–1. If the third part flies off with a velocity of 4 ms^–1, its mass would be

A
5 kg

B
7 kg

C
17 kg

D
3 kg

Solution
Question 9
4 / -1

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

A
2.5 km/hour

B
20 km/hour

C
40 km/hour

D
50 km/hour

Solution
Question 10
4 / -1

If a force of 250 N act on body, the momentum acquired is 125 kg-m/s. What is the period for which force acts on the body

A
0.5 sec

B
0.2 sec

C
0.4 sec

D
0.25 sec

Solution