What net force, acting for 0.001 seconds, will change the velocity of a 100g baseball from 30 m/s to the east to 40 m/s to the west?

Question

please Show work and equations you use

Answer 1

Use the relation between impulse and momentum to find the force. Take the initial direction of motion to be the positive direction.

Ft = mv₂ - mv₁ ⇒

F = m(v₂ - v₁) / t

m = 0.100 kg (be careful with units)

v₁ = +30 m/s

v₂ = -40 m/s (be careful to keep the sign)

t = 0.001 s

Plug these number in these units and signs into the equation for F, and get force in units of Newtons. If F comes out positive, the force is in the same direction as the initial direction of motion. If it comes out negative, the force opposes the initial direction of motion.