2. 18 Billion Joules, 18 Gigajoules
3. 9.81 Billion Joules, 9.81 Gigajoules
Use the formulas provided,
KE=(1/2)mv^2 and PE=mgh, noting that g=9.81
A golf player hits a golf ball of mass 100 g and imparts it a speed of 50 m/s. If golf stick remains in contact with the ball for
s, then the average force exerted by the golf stick on the ball.
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