A cart is moving on a track and slows down because of friction. Select all of the following statements that explain why the cart slows down. [You can select more than one answer] kinetic energy from the cart is converted to thermal energy in the cart

chemical potential energy in the cart is converted to kinetic energy in the track

kinetic energy from the cart is converted to thermal energy in the track

kinetic energy from the cart is converted to chemical potential energy in the cart

Ways that industry and agriculture use physical properties to separate substances

Lightning is an example of what phenomenon? a release of a large amount of energy an absorption of a large amount of energy a natural electric circuit a natural electric current

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".