During a circus performance, a 71.2-kg human cannonball is shot out of an 18.0-m-long cannon. If the human cannonball spends 0.7
85 s in the cannon, determine the average net force exerted on him in the barrel of the cannon. (Assume the acceleration is constant.)
1 answer:
Answer:
F=ma = 71.2 * 58.42 = 4159.5 N
Explanation:
for FORCE we need a: acceleration (F=ma)
for acceleration we can apply the second equation of motion
s = ut + 0.5at^2
where
s = 18 m ( displacement)
u = 0 m/s (initial velocity)
t = 0.785 s (time)
18 = 0.5 * a * (0.785)^2
a = 58.42 m/s^2
now
F=ma = 71.2 * 58.42 = 4159.5 N
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