Impulse
What are the units for impulse?
kgm/s
What is the conservation of momentum?
Momentum before = momentum after
Momentum is neither created nor destroyed
Kinetic Energy is conserved in these types of collisions.
What is an elastic collision?
This is the name of Mr. Hollingsworth's dog
Who is Merle?
How do you find the impulse if you know the initial and final momentum of an object?
momentum final - momentum initial
What is the velocity of a car of 1500 kg if it is moving west with a momentum of 3000 kgm/s
2 m/s
True!
Does Mr. Hollingsworth prefer Harry Potter or Star Wars?
Harry Potter
When a car of mass 5000 kg travelling at 30 m/s crashes into a wall and comes to rest, what is the impulse acting on the object?
-150,000 kgm/s
15 kg 5 kg |
0-----> 0 | 0--->
5 m/s | v m/s
Find the total velocity afterwards, if they stick together
3.75 m/s
When two snooker balls collide, and you hear a click as they hit, why does that indicate that it is an inelastic collision?
Losing energy, as sound
Where did Mr. Hollingsworth just visit on holiday?
Punta Cana
What is the momentum of a 3 kg ball initially travelling at 4 m/s to the right, and after colliding with an object finally travelling 2 m/s to the left?
- 6 kgm/s
4 kg 3 kg | 4 kg 3 kg
0---> <--0 | 0--> 0-->
3m/s 1m/s | 1 m/s v m/s
Determine the velocity v of the 3 kg ball after the collision
4.33 m/s
What must the following velocities be for this collision to be elastic:
3 kg 4 kg | 3 kg 4 kg
0 ---> <---0 | <---0 0--->
4 m/s -3 m/s | v1 m/s v2 m/s
v1 = -4 m/s
v2 = 3 m/s
What is the name of Mr. Hollingsworth's birthplace?
Warwick