Force Test

Result

Force Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

What is the change in momentum of an object if a force equal to 'Z' newtons is applied on it for 3 seconds?

A
1Z

B
3Z

C
Z

D
None of these

Solution

Change in momentum = Impulse momentum = Force x Time = Z x 3 = 3Z
Question 2
1 / -0

What amount of force is applied on a body of mass `m` whose velocity changes from `u` to `3u` in 1 second?

A
1 mu

B
4 mu

C
2 mu

D
3 mu
Question 3
1 / -0

The flying of birds is a consequence of Newton's

A
First Law

B
Second Law

C
Third Law

D
Second Law and Third Law
Question 4
1 / -0

According to Newton's Third Law of Motion, action and reaction always act on

A
the same body in the same direction

B
different bodies in the same direction

C
the same body in opposite directions

D
different bodies in opposite directions

Solution

Correct Answer : different bodies in opposite directions
Question 5
1 / -0

Two bodies A and B collide. No external force acts on the bodies during collision. What is the ratio of the masses of body A and body B, if the velocities of the bodies before and after the collision are as given in the table below ?

Velocities before collision

Velocities after collision

u_A = + 5 m/s
u_B = 0
v_A = + 2 m/s
v_B = + 4 m/s

A
6 : 5

B
4 : 3

C
4 : 7

D
9 : 2
Question 6
1 / -0

Two objects, each of mass 3 kg are moving with the same velocity of 6 m/s in the same straight line but in opposite directions. They collide and stick together. What is the velocity of combined objects after the collision?

A
6 ms^–1

B
3 ms^–1

C
0 ms^–1

D
9 ms^–1
Question 7
1 / -0

The momentum of a ball moving with a velocity of 2 m/s is 4 kg ms^-1. What is the mass of the ball?

A
2 kg

B
4 kg

C
8 kg

D
0.5 kg

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Velocities before collision	Velocities after collision
u_A = + 5 m/s u_B = 0	v_A = + 2 m/s v_B = + 4 m/s

Force Test - 2

Result

Force Test - 2

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Rank

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SHARING IS CARING

Question 1

1Z

3Z

Z

None of these

Solution

Question 2

1 mu

4 mu

2 mu

3 mu

Question 3

First Law

Second Law

Third Law

Second Law and Third Law

Question 4

the same body in the same direction

different bodies in the same direction

the same body in opposite directions

different bodies in opposite directions

Solution

Question 5

6 : 5

4 : 3

4 : 7

9 : 2

Question 6

6 ms–1

3 ms–1

0 ms–1

9 ms–1

Question 7

2 kg

4 kg

8 kg

0.5 kg

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6 ms^–1

3 ms^–1

0 ms^–1

9 ms^–1