Figure 7: shows the relationship between loft angle and linear velocity
From the Figure 7, there is a negative relationship between the loft angle of golf club and the linear velocity of golf ball. Which means as the loft angle increases, the linear velocity of ball decreases. The golf ball travels with relatively fast velocity at 9.2ms-1, when the loft angle is 0 degree, but it travels relatively slower at 3.7ms-1 when the loft angle is 80 degree. Also, the shape of graph seems to be a non linear graph rather than linear graph, because a linear best fit line does not pass through the error bars exactly.
Figure 8: shows the relationship between loft angle and angular velocity
From Figure 8, there is a positive relationship between the loft angle and the angular velocity of golf ball. As the loft angle increases, the angular velocity of ball also increases. It seems that the ralationship between angular velocity and loft angle is opposite to the linear velocity and and loft angle. Which means that the golf ball spins relatively fast at 13.9rad s-1 when the loft angle is 80 degree, but the spin of ball is relatively slower at 7.2 rad s-1 when the loft angle is 0 degree. Also the graph seems more close to …show more content…
The direction of force between golf ball and golf club does not generate much torque.
These 2 graphs suggests to me that when the loft angle is low, the gravitational potential energy of the club is more likely to be converted to the linear kinetic energy of the ball, whereas when the loft angle is low, the energy is more likely to be converted to the rotational kinetic energy of the ball.
In order to calculate the loss of gravitational potential energy, Slow motion video of Iphone is used to determine the final height of golf