If an object has 110 J of potential energy when it is 40 m off the ground, what is it’s potential energy when it is 200 m off the ground

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a. true or b. false