A bike and rider, 115-kg combined mass, are traveling at 7.6 m/s . A force of 125 N is applied by the brakes. What braking distance is needed to stop the bike?

Of is j/kg·k. if a 2.6 kg of isk to k, is ?

One soccer player (a) is moving at 4 km/h when she kicks the ball while another soccer player (b) is moving at 8 km/h. what statement accurately compares their kinetic energy if they have the same mass? a) both soccer players have the same kinetic energy. b) player b has twice the kinetic energy of player a. c) player b has four times the kinetic energy of player a. d) their kinetic energy can't be compared without knowing their mass.

What caused magnetic fields? what happens if you keep breaking a magnet in two until you reach a single atom?