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Nadusha1986 [10]
2 years ago
14

Answer the following regarding Momentum Change and Force:

Physics
1 answer:
blagie [28]2 years ago
5 0

A. The average force exerted on the ball during the serve is 57 N

B. The resistive force, given the data is -1125 N

<h3>A. How to determine the average force</h3>
  • Mass (m) = 57 g = 57 / 1000 = 0.057 Kg
  • Initial velocity (u) = 50 m/s
  • Time (t) = 0.05 s
  • Acceleration (a) = u / t = 50 / 0.05 = 1000 m/s²
  • Force (F) = ?

F = ma

F = 0.057 × 1000

F = 57 N

<h3>B. How to determine the resistive force</h3>
  • Mass (m) = 3000 Kg
  • Initial velocity (u) = 72 Km/h = 72 / 3.6 = 20 m/s
  • Final velocity (v) = 18 Km/h = 18 / 3.6 = 5 m/s
  • Time (t) = 40 s
  • Force (F) = ?

F = m(v – u) / t

F = 3000(5 – 20) / 40

F = -1125 N

Learn more about momentum:

brainly.com/question/250648

#SPJ1

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