20 kg object travels 28 meter and stops. coefficient friction = 0.085 how much work was done by friction?

A race driver has made a pit stop to refuel. after refueling, he leaves the pit area with an acceleration whose magnitude is 6.35 m/s2; after 4.0 s he enters the main speedway.

Which piece of lab equipment measures mass

A constant horizontal force F is applied to a 5 kg box on a frictionless horizontal surface. The box starts from rest and moves 12 meters in 5 seconds.

Energy moves through an ecosystem, is known as a a. habitat. c. food net. b. food chain. d. food web.

A wave has a frequency of 450 Hz and a wave length of 00.52 m what is the speed of the wave?

What is the explanation for feather beds being warm

A student wearing frictionless in-line skates on a horizontal surface is pushed by a friend with a constant force of 47 N. How far must the student be pushed, starting from rest, so that her final kinetic energy is 354 J?

Suppose a rocket ship in deep space moves with constant acceleration equal to 9.8 m/s2, which gives the illusion of normal gravity during the flight.

A canoeist on a lake throws a 0.145 kg baseball at 20.0 m/s to a friend in a different canoe. Each canoe with its contents has a mass of 120 kg, and is at rest initially.

You short-circuit a 9 volt battery by connecting a short wire from one end of the battery to the other end. if the current in the short circuit is measured to be 18 amperes, what is the internal resistance of the battery?