(a) An 8-N force pushes a 0.5-kg ball on a horizontal table for 3m starting from
ID: 1780064 • Letter: #
Question
(a) An 8-N force pushes a 0.5-kg ball on a horizontal table for 3m starting from rest. If there is no friction, what is the final KE of the ball? (b) The same force is used to raise the ball a height of 3m starting from rest. What is its final KE now? (a) An 8-N force pushes a 0.5-kg ball on a horizontal table for 3m starting from rest. If there is no friction, what is the final KE of the ball? (b) The same force is used to raise the ball a height of 3m starting from rest. What is its final KE now?Explanation / Answer
Here ,
F = 8 N
m = 0.5 Kg
d= 3 m
a)
final KE of the ball = work done by force F
final KE of the ball = 8 * 3
final KE of the ball = 24 J
b) for raising the height
final KE of the ball = work done by force F + work done by weight
final KE of the ball = 24 - 0.50 * 9.8 * 3
final KE of the ball = 9.3 J
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