Show:
Momentum
Work/Power
Energy
Conservation of Energy
Micellaneous
100
What two things does the momentum of an object depend upon?
mass and velocity
100
What is the difference between work and power?
work is a force that causes a displacement power is work divided by time Power depends on time, work does not.
100
What happens to the gravitational potential energy of an apple as it falls to the ground?
The gravitational potential energy decreases and transforms into kinetic energy as the apple picks up speed.
100
What is the equation for the conservation of energy?
Total Energy Before = Total Energy After or Total Energy at Top = Total Energy at Bottom
100
At the end of the film, The Wizard of Oz, Dorothy clicks her heels and recites what five-word phrase?
There's No Place Like Home
200
What is the momentum of a 2.0-kg brick moving through the air at 12 m/s?
24 kg m/s
200
A force of 600 N is needed to push a car across a lot. Two students push the car 60.0 m. How much work is done?
36,000J
200
A 95.0 kg runner sprints with a velocity of 6.25 m/s. What is the runner’s kinetic energy?
1855 J
200
If both the mass and the velocity of an object are doubled, the kinetic energy of the object will increase by what factor
8 (2X2^2)
200
Does light travel more quickly through water or through air?
Through Air
300
What is the impulse of a 65.8-kg halfback encountering a force of 1025 N for 0.350 seconds?
358.8 Nm
300
A girl pushes a box over a distance of 5.0 m with a force of 75.0 N in 1 min. How much power does she exert?
6.25 W
300
What is the PE of a 60 kg student standing on the top floor of the Empire State Building, which is approximately 380 meters above ground?
223,440J
300
What is the kinetic energy of the skier at the bottom of the slope? Refer to power point slide 2.
58,800 J (The kinetic energy at the bottom will be the same as the potential energy at the top because the skier started from rest - all of the original energy is converted in to kinetic energy at the ground)
300
Which two states form the entire western border of Minnesota?
North and South Dakota
400
A clay ball with a mass of 0.35 kg hits another 0.35 kg ball at rest, and the two stick together. The first ball has an initial speed of 4.2 m/s. What speed do the two move with after the collision?
2.1 m/s
400
A 700.0 N delivery man carries a 15.0 N package up five flights of stairs to a height of 18.0 m. How much work was done on the package?
270 J
400
At what position is the kinetic energy of the pendulum the greatest? Refer to power point slide 1.
II
400
A 0.35 kg toy on a shelf falls to the floor. If the final velocity of the toy just before impact is 6.26 m/s, from what height did it fall?
2 m
400
What color is absynth?
Green
500
A 9.5 kg motorcycle, initially traveling at 4.5 m/s, crashes into a wall and comes to rest in 0.05 seconds. How much force acted on the motorcycle to bring it to a stop?
-855 Newtons
500
A bulldozer pushes a boulder with a force of 1,000 N over a distance of 41 m, in a time of 75 s. How much work is done by the bulldozer?
41,000 J
500
A 1009 kg car changes its speed from 29 m/s to 35 m/s. What is the change in kinetic energy of the car?
193,728 J
500
What is the speed of the cars at the top of the second hill? Refer to power point slide 3.
12.5 m/s
500
What is the ballet move called when you make a 360 degree turn on one foot?
pirouette