Worksheets3rd Law of Motion
Total questions: 10
Worksheet time: 5mins
The impulse is ______ the change in momentum
greater than
equal to
less than
always double
A student throws a ball against a wall. Which statement best explains what is happening in the picture.
The energy of the ball is destroyed as it strikes the wall.
The energy of the ball becomes negative as it hits the wall.
The force from the wall on the ball is equal and opposite to the force from the ball on the wall.
The force exerted by the ball on the wall is greater than the force exerted by the wall on the ball.
Which example best explains Newton's Third Law of Motion?
When a glass slid across a table, it spilled water when it stopped suddenly.
An engine used less work to move a lighter car than when it moved a heavier car.
When you sit on a chair, your body exerts a downward force on the surface of the chair, while the chair exerts an equal and upward force on your body.
Newton’s third law of motion explains the two forces namely ‘action’ and ‘reaction’ coming into action when the two bodies are in contact with each other. These two forces:
Always act on the same body
Always act on the different bodies in opposite directions
Have same magnitude and direction
Acts on either body at normal to each other
A truck that is travelling at a constant speed is carrying some boxes. If the truck comes to a sudden stop, what will most likely happen to the boxes?
They will stay in the middle of the truck.
They will slide toward the front of the truck.
They will slide toward the back of the truck.
They will fall off the side of the truck.
A 5 N force is applied to a 3 kg ball to slow it down from 9 m/s to 3 m/s. What is the impulse on the ball?
18 N⋅s
-10 N⋅s
-18 N⋅s
-45 N⋅s
A car has a mass of 1200 Kg and travels at 20 m/s. What is it's momentum?
60 kg m/s
60 N
24000 N
24000 kg m/s
If a force of 250 N acts on the body, the momentum acquired is 125 kgms-1; what is the period for which force acts on the body?
0.5 s
0.2 s
0.4 s
0.25 s
A man drops an apple in the lift. He finds that the apple remains stationary and does not fall . The lift is : ___________
going up with constant speed
going down with constant speed
going up with constant acceleration
going down with constant acceleration equal to g
If an elevator is going up with acceleration, the apparent weight of a body is
you feel lighter
you don’t feel your weight
you feel heavier
you feel your true weight
