Question

The Velocity of a 621 kg auto is changed from 10.0 m/s to 44.0 m/s in 70.7 s by external, constant force. What is the result in chambers in momentum of the car? What is the magnitude of the force?

Answer 1

Answer on question #58623, Physics / Mechanics — Relativity

Question The Velocity of a 621 kg auto is changed from 10.0 m/s to 44.0 m/s in 70.7 s by external, constant force. What is the result in chambers in momentum of the car? What is the magnitude of the force?

Solution Change of momentum is

$\Delta p=m\Delta v=621\cdot(44-10)=21114\,kg\cdot m/s$

Magnitude of force can be found as

$F=\frac{\Delta p}{t}=\frac{21114}{70.7}\approx 298.6\,N$