University:
California Institute of Technology
Course:
EE/APh 40 | Physics of Electrical Engineering
Academic year:

2022
Views:

356

Pages:

8
Author:

StellarStrategist

8.3 Bouncing The impulse required to bring an object to a stop and then to “throw it back again” is greater than the impulse required merely to bring the object to a stop. 8.3 Bouncing Suppose you catch a falling pot with your hands. • You provide an impulse to reduce its momentum to zero. • If you throw the pot upward again, you have to provide additional impulse. 8.3 Bouncing If the flower pot falls from a shelf onto your head, you may be in trouble. If it bounces from your head, you may be in more serious trouble because impulses are greater when an object bounces. The increased impulse is supplied by your head if the pot bounces. 8.3 Bouncing Cassy imparts a large impulse to the bricks in a short time and produces considerable force. Her hand bounces back, yielding as much as twice the impulse to the bricks. 8.3 Bouncing The block topples when the swinging dart bounces from it. Without the rubber head of the dart, it doesn’t bounce when it hits the block and no toppling occurs. 8.3 Bouncing The waterwheels used in gold mining operations during the California Gold Rush were not very effective. Lester A. Pelton designed a curve-shaped paddle that caused the incoming water to make a U-turn upon impact. The water “bounced,” increasing the impulse exerted on the waterwheel. 8.3 Bouncing The curved blades of the Pelton Wheel cause water to bounce and make a U-turn, producing a large impulse that turns the wheel. 8.3 Bouncing How does the impulse of a bounce compare to stopping only?

Momentum Lecture 3

of 8

Description

Free up your schedule!

Take 5 seconds to unlock