Agirl is riding her bike at as speed of 12 m/s. she weighs 55 kg and her bike weighs 22kg. what is the kinetic energy of the girl and her bike?

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

What type of electromagnetic wave is used in security pens? a. x-rays c. microwaves b. visible light d. ultraviolet radiation select the best answer from the choices provided

As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is 100) a) static friction. b) kinetic friction. c) a combination of static and kinetic friction. d) neither static nor kinetic friction, but some other type of friction. e) it is impossible to tell what type of friction acts in this situation.