Joe is setting up a test run for a new roller coaster. The coaster car and test dummy have a combined mass of 520 kg, and the portion of the coaster they are
testing drops from a hill into a circular loop 10.0 meters across. What is the minimum speed
the car must be going at the top of the loop? What is the minimum height the hill leading
into the loop must be (measured from the bottom of the loop to the top of the hill)?

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

Apair of 10μf capacitors in a high-power laser are charged to 1.7 kv.a. what charge is stored in each capacitor? b. how much energy is stored in each capacitor?

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical