Laws of Motion Test

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Laws of Motion Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following relationships is correct for change in momentum?
(where m is mass and v is velocity)

A
ΔP = ΔmVΔV

B
ΔP = mΔV

C
ΔP = ΔmV

D
ΔP = ΔmΔV
Question 2
1 / -0

Two forces 50 N, 20 N are acting on a body at an angle of 180°. Find net force. If these forces act at angle 0°, what would be net force?

A
At 180° angle, force = 30 N, at 0° angle force = 30 N

B
At 180° angle, Force = 30 N, At 0° angle force = 70 N

C
At 180° angle, Force = 70 N, At 0° angle force = 70 N

D
At 180° angle, Force = 0 N, At 0° angle force = 0 N
Question 3
1 / -0

Which of the following statements gives the correct definition of inertia?

A
The force that causes all objects to stop.

B
The force that keeps moving objects moving and stationary objects at rest

C
The willingness of an object to lose to motion eventually.

D
The tendency of any object to resist change and keep doing whatever it is doing
Question 4
1 / -0

Which of the following is an inherent property of each object?

A
Momentum of body

B
Speed of object

C
Inertia of object

D
Mass of object
Question 5
1 / -0

Why does athletes often land on sand after taking a high jump?

A
Force exerted on his feet decreases

B
Time duration to come to rest increases

C
Force exerted on his feet increases

D
Both (1) and (2)
Question 6
1 / -0

A machine with a force equal to 140 N accelerates a mass of 20 Kg at 7 m/s². What amount of force it should apply so that acceleration remains the same but mass becomes double. Also find acceleration if mass is double than original mass but force remains same as original force?

A
140 N, 4,5 m/s²

B
280 N, 3.5 m/s²

C
280 N, 7 m/s²

D
140 N, 7 m/s²
Question 7
1 / -0

A baseball will accelerate faster than a tennis ball if same force is given to them.

A
The statement is true.

B
The statement is false.

C
The statement is true only if the air resistance is neglected.

D
Both (2) and (3).
Question 8
1 / -0

Find the change in momentum if initial mass is 5 kg and the change in velocity is 7 m/sec.

A
7/5 kg m/sec

B
35 kg m/sec

C
5/7 kg m/sec

D
49/5 kg m/sec
Question 9
1 / -0

A 1000 Kg car accelerate at a rate of 6 m/s². Find the force produced by car`s engine?

A
600 N

B
6/100N

C
6000 N

D
1000/6

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Laws of Motion Test - 3

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Laws of Motion Test - 3

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Question 1

ΔP = ΔmVΔV

ΔP = mΔV

ΔP = ΔmV

ΔP = ΔmΔV

Question 2

At 180° angle, force = 30 N, at 0° angle force = 30 N

At 180° angle, Force = 30 N, At 0° angle force = 70 N

At 180° angle, Force = 70 N, At 0° angle force = 70 N

At 180° angle, Force = 0 N, At 0° angle force = 0 N

Question 3

The force that causes all objects to stop.

The force that keeps moving objects moving and stationary objects at rest

The willingness of an object to lose to motion eventually.

The tendency of any object to resist change and keep doing whatever it is doing

Question 4

Momentum of body

Speed of object

Inertia of object

Mass of object

Question 5

Force exerted on his feet decreases

Time duration to come to rest increases

Force exerted on his feet increases

Both (1) and (2)

Question 6

140 N, 4,5 m/s2

280 N, 3.5 m/s2

280 N, 7 m/s2

140 N, 7 m/s2

Question 7

The statement is true.

The statement is false.

The statement is true only if the air resistance is neglected.

Both (2) and (3).

Question 8

7/5 kg m/sec

35 kg m/sec

5/7 kg m/sec

49/5 kg m/sec

Question 9

600 N

6/100N

6000 N

1000/6

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140 N, 4,5 m/s²

280 N, 3.5 m/s²

280 N, 7 m/s²

140 N, 7 m/s²