A 44.1-g golf ball is struck horizontally with a golf club whose head has a mass of 214 g. The speed of the head of the golf club just before impact was 64 m / s and causes the ball to shoot out with a speed of 77 m/s. By how much does the kinetic energy of the described system (system would be the golf club + golf ball) change during the collision? Note: We assume a 1D collision, where the hitting golf club collides with a certain horizontal speed with the golf ball initially at rest. During the crash, we neglect the force that the person's hands can exert on the golf club. a) Decreases by 569.0065 J b) Increases by 569.0065 J| c) Decreases by 59.6493 J d) Increases by 59.6493 J

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A 44.1-g golf ball is struck horizontally with a golf club whose head has a mass of 214 g. The speed of the
head of the golf club just before impact was 64 m / s and causes the ball to shoot out with a speed of 77
m/s. By how much does the kinetic energy of the described system (system would be the golf club +
golf ball) change during the collision?
Note: We assume a 1D collision, where the hitting golf club collides with a certain horizontal speed with
the golf ball initially at rest. During the crash, we neglect the force that the person's hands can exert on
the golf club.
a) Decreases by 569.0065 J
b) Increases by 569.0065 J
c) Decreases by 59.6493 J
d) Increases by 59.6493 J
Transcribed Image Text:A 44.1-g golf ball is struck horizontally with a golf club whose head has a mass of 214 g. The speed of the head of the golf club just before impact was 64 m / s and causes the ball to shoot out with a speed of 77 m/s. By how much does the kinetic energy of the described system (system would be the golf club + golf ball) change during the collision? Note: We assume a 1D collision, where the hitting golf club collides with a certain horizontal speed with the golf ball initially at rest. During the crash, we neglect the force that the person's hands can exert on the golf club. a) Decreases by 569.0065 J b) Increases by 569.0065 J c) Decreases by 59.6493 J d) Increases by 59.6493 J
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Solution:

The speed and mass of the head of the golf club are 214g and 64 m/s respectively. This is the speed of the golf club just before the collision and the golf bulb was at rest. Therefore, the initial kinetic energy of the system is,

KEi=12mv2      =12×214g×642      =438.272 J

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