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yogibear9998
10.03.2020 •
Physics
When Woods hits a 0.04593 kg golf ball, the golf ball is usually traveling around 281 kilometers per hour. What average force does he exert on a golf ball if the club head and golf ball are in contact for 0.030 seconds?
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Ответ:
128.9 N
Explanation:
The force exerted on the golf ball is equal to the rate of change of momentum of the ball, so we can write:
where
F is the force
The change in momentum can be written as
where
m = 0.04593 kg is the mass of the ball
u = 0 is the initial velocity of the ball
Substituting into the original equation, we find the force exerted on the golf ball:
Ответ:
Actually Welcome to the Concept of the Work, energy and power.
Potential energy = m*g*h, here g = 9.8 m/s^2 (universal value)
hence, h = P/m*g
==> h = 74/ 5*9.8
===> h = 74/49
==> h = 1.51 meters
hence the height is 1.51 m