Impulse
The area under a _________________________ graph gives impulse.
Force versus time
What is the equation for momentum?
p=mv
Two dodge balls are rolling toward each other and bounce off. The momentum change of one of the balls is equal to the __________ that that ball delivers to the other ball.
impulse
What is the formula for work?
W=F*d*cos(theta)
What is the equation for (gravitational) potential energy?
U_g =m*g*h
If the average force increases then what happens to the impulse?
It increases
Suzie pushes a crate with 200 N of force across her 7-meter long living room. How much work does Suzie do on the crate?
Suzie does 1400 J of work.
What is the equation for kinetic energy?
K = 1/2 mv^2
In a baseball game, a batter hits a ball for a home run. Compared to the magnitude of the impulse imparted to the ball, the magnitude of the impulse imparted to the bat is?
the same
Suzie is pulling a sled traveling at constant velocity with 40 N of force applied. She travels 58 meters to the start of the sledding hill. How much work is she doing on the sled?
About 2320 Joules
Suzie pushes a crate at constant speed doing 450 J of work on it. How fast is the crate going at the end of this, assuming the crate starts at 1 m/s?
1 m/s. The same speed as before since the the crate is moving AT CONSTANT SPEED.
[See image] What is the average force exerted during this time interval?
1.6 N
A 50 kg person is riding a bicycle East at a speed of 2.0 m/s. If the momentum of the combined person and bike system is 122 kg m/s, what is the mass of the bicycle?
11 kg
What is the change in momentum of a 1 kg object with an initial velocity of 2 m/s and a final velocity of 7 m/s?
5 kg m/s
Suzie is pulling a sled traveling at constant velocity with 40 N of force applied. She travels 58 meters to the start of the sledding hill. How much work is friction doing on the sled?
About -2320 Joules (taking energy away from the system)
Suzie pushes a crate (2 kg) from rest, doing 450 J of work on it, on a frictionless surface. How fast is the crate going at the end of this?
About 21 meters per second.
[See image] What is the impulse?
16 N s
[See image]. Rank from largest to smallest, the momenta of the objects shown in the image.
2 > 1 = 3 = 5 > 4
Starting from rest, object 1 is subject to a 10 N force for 3.0 s. Object 2, which also starts from rest, is subject to a 20 N force for 2.0 s. Which object would have the greater final speed and why?
Object 1 - Although, object 2 has a larger change in momentum than object 1, its change in momentum is not double that of object 1, but its mass is twice that of object 1.
A 2300-kg truck traveling at 30 m/s comes to a complete stop. The truck experiences a net average force of 12500 N. How far (distance) did the truck travel before coming to a complete stop?
About 83 meters.
You brought your phone (137 grams) to the top of the Grand Canyon (1857 meters) to take pictures of the view. How much work did you do on the phone?
About 2500 Joules.