Work
This is the unit of Work
What is a Joule?
These are the two variables that kinetic energy is dependent upon
What are mass and velocity?
This is the equation for gravitational potential energy
What is PE=mgh
A ball is sitting on a ledge. This is the kinetic energy of the ball just before it hits the ground if the potential energy it had before it was dropped was 30 J.
What is 30 J?
This is the unit for energy.
What is a Joule?
If a neighbor pushes a lawnmower four times as far as you do but exerts only half the force, who has done more work?
The neighbor.
This is the amount that kinetic energy changes when the velocity of an object is doubled.
What is increased x4?
This is how much potential energy is gained by a 150 kg climber that scales a 100 m cliff.
What is 147,000 J?
Pumpkin A has a mass of 100 kg and is chucked at 10 m/s at an unsuspecting bystander. Pumpkin B has a mass of 200 kg and is chucked at 5 m/s at the same poor bystander. Which had more Kinetic Energy?
What is Pumpkin A?
Are you traveling faster when you first skydive out of a plane or when you are about to hit the ground? (Ignore air resistance and assume your parachute is broken.)
What is when you are about to hit the ground?
If a neighbor pushes a lawnmower four times as far as you do but exerts only half the force, who has done more work...and by how much?
The neighbor ... 2x as much work
This is the amount of kinetic energy of a 65kg sprinter running at 8.4 m/s?
What is 2293 J?
This is the loss in potential energy of an 8kg apple that falls from a 5 m high tree branch.
What is (-) 392 J?
A huge glob of Silly Putty falls from the sky and splats on the ground. Why didn't the Silly Putty bounce?
What is the energy was converted into other forms of energy (sound, elastic potential, heat, etc.)?
The type of energy associated with stretched or compressed objects (such as springs or rubber bands).
What is Elastic Potential Energy?
This is the amount of net work done on a box that moves 20m and is pushed with a 350N horizontal force.
What is 7000 J?
This is the amount that kinetic energy changes when the mass of an object is doubled.
What is doubled?
Determine the gravitational potential energy of a guillotine if the mouton (the weighted blade) has a mass of 40 kg and is raised 2.5 m above the neck of the condemned.
What is 980 J?
A ball is dropped from a height with Potential Energy of 100 J. Halfway down the drop, how much Potential Energy does the ball have?
What is 50 J?
Spring A is harder to stretch than Spring B. Which has a greater spring constant?
What is Spring A?
Arnold Schwarzenegger benches 500 lbs exactly 10 times. Arnold's arms are exactly 3 feet long. After returning to his starting position, how much work did Arnold accomplish?
What is 0 J?
What is the kinetic energy of a 0.5 kg can of soup that is rolling across the floor at a speed of 2.5 m/s?
What is 1.56 J?
This is the change in potential energy when a 49 kg rock, initially 200m above the ground, falls to a ledge 138 m above the ground.
What is 29772.4 J?
A ball is dropped from a height with Potential Energy of 100 J. Halfway down the drop, how much Kinetic Energy does the ball have?
What is 50 J?
A spring is compressed 1.0 cm. Another identical spring is stretched 1.0 cm. Which spring possesses more energy?
What is they have the same amount of energy?