Aproton is moving at 425 m/s. (a) how much work must be done on it to stop it? (a proton has a mass of 1.67×10−27 kg.) (b) assume the net braking force acting on it has magnitude 8.01×10−16 n and is directed opposite to its initial velocity. over what distance must the force be applied? watch your negative signs in this problem.

Match each scenario to the form of energy it represents

Acid precipitation chemically weathering a 5.0-kg limestone rock . which coukd be the result ?

An athlete swings a ball, connected to the end of a chain, in a horizontal circle. the athlete is able to rotate the ball at the rate of 8.13 rev/s when the length of the chain is 0.600 m. when he increases the length to 0.900 m, he is able to rotate the ball only 6.04 rev/s. (a) which rate of rotation gives the greater speed for the ball? 6.04 rev/s 8.13 rev/s (b) what is the centripetal acceleration of the ball at 8.13 rev/s? m/s2 (c) what is the centripetal acceleration at 6.04 rev/s? m/s2