motion of physics

Question

As a baseball is being caught, its speed goes from 20.0 to 0 m/s in about 0.00750 s. Its mass is 0.185 kg.



(a) What is the baseball's acceleration (Mind the sign!)?

As a baseball is being caught, its speed goes from 20.0 to 0 m/s in about 0.00750 s. Its mass is 0.185 kg.

(b) What is the magnitude of the force acting on it?

Answer 1

Average acceleration is a = Δv/Δt < 0 if v decreases as t increases. The average force is F = ma.