Question

8%) Problem 5: A golf ball m=0.185 kg strikes a vertical concrete wall elastically with a horizontal velocity of y = 14 m/s. Randomized Variables m= 0.185 kg v=14 ms 25% Part (a) Write an expression for the magnitude of the impulse / experienced by the ball, o B CD S 9 7 4 a d S 2 6 3 h m P 0 S t VO Submit Hint I give up! Hints deduction per hit Hints remaining Feedbacle deduction par feedback 254 Part (b) If the ball was in contact with the wall for:- 1o, what is the magnitude of the force F the ball experienced in N? 250 Part() If the ball rebounds with only half the velocity it comes in with what is the magnitude of the impulse in kg m. 25 Part (d) How much kinetic energy was lost in the above situation in joules?

Answer 1

a.

Impulse,

b.

Force, $F = \frac{I}{t} = \frac{ 2.59 }{0.1} = 25.9 N$

c.

Impulse,

d.

Kinetic Energyn Lost, $KE_{lost} = \frac{1}{2}\left ( v_1^2 - v_2^2 \right ) = \frac{1}{2} * 0.185 ( 14^2 - 7^2) = 13.6 J$