Question
A ball with a mass of 2kg rests on an incline with an angle of 30degrees .The ball is to be released to roll down the incline plane, neglecting all friction. Determine :
A. The loss in potential energy after it has rolled 14metres
B. The velocity after it has rolled 14metres
A. The loss in potential energy after it has rolled 14metres
B. The velocity after it has rolled 14metres
Answers
oobleck
A. it has dropped 14sin30° = 7m, so PE lost is mgh = 2*9.8*7 = ____ J
B. KE gained = PE lost, 1/2 mv^2 = PE lost. solve for v
B. KE gained = PE lost, 1/2 mv^2 = PE lost. solve for v