Answer:
3.6 s.
Explanation:
Impulse: This can be defined as the product of force and time. The S.I unit of impulse is N.s.
From newton's second law of motion,
The expression for impulse is given as,
I = Ft = m(u-v) ................. Equation 1
make t the subject of the equation
t = m(v-u)/F................... Equation 2
Where I = impulse, v = final velocity, u = initial velocity, m = mass of the ball, F = force, t = time
Given: m = 3 kg, F = 5 N, u = 9 m/s, v = 3 m/s
Substitute into equation 2
t = 3(9-3)/5
t = 3(6)/5
t = 3.6 s.
