A dropped object has its highest kinetic energy just before this location
What is hitting the ground
While he and his family are moving, Joshua drags his suitcase across the floor. In doing so he changes the suitcase's energy by 1,099 Joules. If he does all of this within 17 s, how much power has he put out??
What is 65 W
A person lifts a ball so that it has 50 J of potential energy. They then drop it. How much kinetic energy does it have before it hits the ground?
50 J
A dropped object has equal kinetic and potential energies at this location
What is the midpoint of its fall
position where the potential energy is at its lowest for a dropped object
What is bottom
If Aimee does 5.1 J of work to move her dresser drawer a distance of 2.3 m and all of this is done in 8 s, how much power has been exerted??
What is .64 W
A cart is at rest and compressing a spring. The spring stores 100 J of elastic energy. The cart then releases and moves across a flat ground. Some time later it has 75 J of kinetic energy. How much thermal energy was created?
25 J
Ball A is held 3.0 meters above the floor. Ball A has a mass of 4.0 kg. At what location must you hold Ball B, a ball with a mass of 6.0 kg so that it has the same potential energy as Ball A?
What is 2.0 meters
A 6.0 kg cart is launched up a hill. At the bottom of the hill it is moving at 4.0 m/s. If no energy is lost, what is the greatest height the cart can reach?
0.81 meters
A 2.3 kg mass is attached to a spring that has 4.76 J of elastic energy stored in it. What is the mass' speed as it is launched from the spring?
What is 2 m/s
You run up the top of the stairs. You then run to the bottom of the stairs in the same amount of time. What is your Power? (Hint, what is you change in energy?)
What is 0 W
A 3.0 ball is held at rest 9.0 meters above the ground. What is the ball's speed right before it hits the ground?
13.3 m/s
Ek = 100 J v = 2 m/s What is the object's mass??
What is 50 kg
Person A and Person B are competing against each other, they both can lift 75 kg boxes 3.5 m off of the ground. Person A lifts her box in 1.5 s and Person B lifts his box in 2.4 s. Which person uses more power??
What is Person A
A 3.0 kg ball is rolled up a hill. At the bottom of the hill, the ball is moving at 6.0 m/s. While rolling up the hill, 20 J of energy leaves the system through work. What is the highest height the ball reaches?
1.15 meters