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- 1. Fill in the Blank
Impulse is a __________________________
- 2. Fill in the Blank
Impulsive force is the ______________________________ in a collision or impact in a short period of time
- 3. Multiple Choice
The symbol and unit for Impulse are
J and N/s
J and N s
F and N
W and N s
- 4. Multiple Choice
Which of the following situations does not require large impulse force?
A baseball competition
A karate expert breaking a piece of plank with his bare hands
A high jumper jumping across the pole onto a thick mattress
A mother pounding chillies with a pestle
- 5. Multiple Choice
A stationary hockey ball with a mass of 2 kg is given a horizontal impulse of 30.0 N s. What is the velocity of the ball after the impact?
10 m s-1
12 m s-1
15 m s-1
18 m s-1
- 6. Fill in the Blank
A man applies a force of 15 N for 0.6 s when throwing a 0.4 kg stone. The impulse given to the stone is .................
- 7. Multiple Choice
The following materials can reduce impulsive force.....
polystyrene packing
mattress for a high jump event
pestle and mortar
- 8. Multiple Choice
A hockey player uses a hockey stick to hit a hockey ball, causing the ball to travel with a velocity of 30 m s-1. If the mass of the hockey ball is 100 g and the time of impact between the hockey stick and the ball is 5 x 10-3 s, calculate the impulsive force exerted by the hockey ball.
600 N
-600 N
600 000 N
-600 000 N
- 9. Multiple ChoiceSofter landings tend toincrease impact forceincrease forceincrease collision timeincrease change in momentum
- 10. Multiple Choice
Impulse can be determined by calculating the area under graph of
force (f) - time (t) graph
impulse (J) - time (t) graph
momentum (p) - time( t) graph
velocity (v) - time (t) graph
- 11. Multiple Choice
Impulse is defined as the product of force and time during which the forces act, J = F.t.
Impulse is produced by a FORCE called :
Applied force
Normal force
Gravitational force
Impulsive force
- 12. Multiple Choice
The units for Impulse are...
N/s
Nkgs
Ns
Kgs
- 13. Multiple Choice
A change in momentum is called an...
Impulsive force
Work
Impulse
Power
- 14. Multiple Choice
A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s.
Calculate the impulse on the ball.
1 N·s
6 N·s
66 N·s
None of these
- 15. Multiple Choice
A 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s. The impulse on the ball is ______ N·s.
-2.5
.
.
-10
-18
-45
- 16. Multiple ChoiceThe impulse-momentum theorem states thatthe impulse on an object is equal to the change in momentum it causesthe force on a moving object is equal to the magnitude of the impulse.the impulse on an object is greater than the change in momentum it causesthe impulse on an object is less than the change in momentum it causes
- 17. Multiple Choice
A constant force of 4.5 N acts on a 7.2-kg object for 10.0 s. What is the change in the object's momentum?
45 kg m/s
72 kg m/s
32.4 kg m/s
0.45 kg m/s
- 18. Multiple Choice
All of the following are examples of impulse except..
A car moving with constant speed
A tennis ball hitting a racket
A pencil getting stuck to the ceiling
A hammer bouncing of a nail
- 19. Multiple Choice
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?
-2.5 N⋅s
-10 N⋅s
-18 N⋅s
-45 N⋅s
- Answer choicesTagsAnswer choicesTags