Answer:
1. -4 Ns
2. 40 N
Explanation:
1.
Impulse : This can be defined as the product of force and time of a body. The S.I unit of impulse is Ns.
From Newton's second law of motion,
Impulse = change in momentum
I = Ft = m(v-u).
I = m(v-u).................. Equation 1
Where I = Impulse imparted to the T-ball.
Given: m = 0.1 kg, u = 40 m/s v = 0 m/s² ( stooped)
Substituting into equation 1
I = 0.1(0-40)
I = 0.1(-40)
I = - 4 Ns.
Note: The negative sign means that the impulse act against the T- ball.
2.
Force = impulse/time
F = I/t ................. Equation 2
Where F = Force, I = impulse imparted to the T- ball, t = time.
Given: I = 4 Ns, t = 0.1 s.
Substituting into equation 2
F = 4/0.1
F = 40 N.
Hence the average net force exerted by the ball on the glove = 40 N
