Which of the following has the least amount of kinetic energy?
2 points

a 10 kg elephant moving at 1 m/s

a 0.5 kg rock moving at 5 m/s

a 0.1 kg balloon moving at 7 m/s

a 0.4 kg bunch of feathers moving at 6 m/s

How would doubling the made of an object change the objects potential energy

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?