A football player throws and accelerates a ball (m = 0.150 kg) from rest to a velocity of 50 m/s in 0.0121 sec. Determine the acceleration of the ball first (this is not the answer) and then the force applied by the player's arm to the ball (enter this value). Neglect resistance forces.

Question

Physics

Bobo

7 May, 08:26

A football player throws and accelerates a ball (m = 0.150 kg) from rest to a velocity of 50 m/s in 0.0121 sec. Determine the acceleration of the ball first (this is not the answer) and then the force applied by the player's arm to the ball (enter this value). Neglect resistance forces.

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Answers (1)

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Pablo Fletcher · Answer 1

Acceleration=4m/s²

Force applied = 619.8N

Explanation:

Using equation of motion

V=u+at we have: u=o, v=50m/s

50 = 0 + a*0.0121

a = 50/0.0121

a = 4m/s²

Neglecting resistance forces

F = ma, where a = v-u/t

F=m * (v-u) / t

F = 0.150 * (50-0) / 0.0121

F=7.5/0.0121

F = 619.8N