Answer:
c. 75 N
Explanation:
Force: This can be defined as the product of mass and the acceleration of a body. The S.I unit of Force is Newton (N).
From Newton's Fundamental equation of kinematic,
F = ma ............................................. Equation 1
Where F = Force exerted by the ball on the bat, m = mass of the ball, a = acceleration.
From motion,
a = (v-u)/t....................................... Equation 2
Where v = final velocity, u = initial velocity, t = time.
Given: v = 25 m/s, u = 0 m/s ( at rest), t = 0.20 s.
Substitute into equation 2
a = (25-0)/0.20
a = 125 m/s².
Also given: m = 0.60 kg.
Substitute into equation 1
F = 0.6(125)
F = 75 N.
Hence the force exerted by the ball on the bat = 75 N,
The right option is c. 75 N
