Answer to Question #149516 in Mechanics | Relativity for Mikkos Joshua Garcia

Question

A 1000 kg Civic is travelling at 30 m/s and accelerates to 40 m/s in 10 seconds.
a. What is the momentum of the car before accelerating?
b. What is the momentum of the car after accelerating for 10 seconds?

Answer 1

Lets solve and write given physical quantities

m = 1000kg - Civic mass;

v₀ = 30m/s - initial speed;

v = 40m/s - speed after 10s;

t = 10s;

Momentum = velocity * mass;

a) Momentum of the car before accelerating:

P₀ = m*v₀ = 1000kg * 30m/s = 30000kg * m/s;

b) Momentum of the car after accelerating for 10 seconds?

P_f = m*v = 1000kg * 40m/s = 40000 kg*m/s