Imagine going to a bowling alley with a bowling ball and a ping pong ball.
Why is a bowling ball better for knocking down pins than a ping pong
... [Show More] ball?
because a bowling ball has a higher mass and a higher speed when rolled which makes it easier to knock down pins.
Which do you think would knock down more pins, a bowling ball moving 10 meters per second or a bowling ball moving 10 centimeters per second?
10 m/s
What two factors seem to most affect the amount of damage that occurs in a collision?
mass and velocity
An air track is a device that helps scientists study motion. Air comes out of holes in the track, allowing the gliders to move with minimal friction.
On the Air Track Gizmo, click Play () to view a collision between the two gliders. What do you see?
both gliders were moving towards each other and then they collided. They kind of bounced off each other and then went in the opposite direction.
Click Reset (). The velocity (v) of an object describes its speed and direction. The velocity of each glider is indicated next to the v1 and v2 sliders. Click Play, and then click Pause () just before the collision.
A. What is the velocity of Glider 1?
5.0 m/s
B. In which direction does Glider 1 move?
right
C. What is the velocity of Glider 2?
-5.0 m/s
D. In which direction does Glider 2 move?
left
A. The gliders have the same mass but different velocities.
Object 1 has a lower velocity so it started off slower but once the two objects collided object 1 got faster. Object 1 momentum increased
B. The gliders have the same mass and one glider is stationary.
Object 1 was stationary and when object 2 came and collided with object 1 it pushed object 1 off the screen.
C. The gliders have the same speed (but moving in opposite directions) and different masses.
Object 1 has a smaller mass but it didn't make a difference in speed.
What is the momentum if the mass is 1.5 kg and the velocity is 4 m/s?
6.00 kg m/s
How could you use the Gizmo to increase a glider's momentum?
Increase the mass for glider 1 and 2.Also turn up the velocity of each glider.
What was the total momentum of the two gliders before the collision?
-2.00 kg m/s
What was the total momentum of the two gliders after the collision?
-2.00 kg m/s
Analyze: What do you notice about the total momentum of the two gliders?
It stayed the same
Draw conclusions: The principle of conservation of momentum states that, in a closed system, the total momentum of all of the objects will remain constant. How do your experiments demonstrate conservation of momentum?
Because the total momentum of all my experiments remained constant.
A moving car has momentum. if it moves twice as fast, its momentum is________________ as much .
twice
If two cars, one twice as heavy as the other, move down a hill at the same speed. Compared to the lighter car, the momentum of the heavier car is ____________ as much.
twice
Can a bullet have the same momentum as a truck?
no because of the difference in mass.
A cue ball (ball that is used to hit the other balls) travels across a pool table and collides with the stationary eight ball. The two balls have equal masses. After the collision, the cue ball is at rest. What must be true regarding the speed of the eight ball?
The speed of the eight ball would be equal to the speed of the cue ball before the collision. [Show Less]