A car moving at 12.5 m/s crashes into a tree and stops in 0.38 s.
v=12.5m/s
t=0.28s
m=77kg
a) Calculate the magnitude of the force, in newtons, the seatbelt exerts on a passenger in the car to bring him to a halt. The mass of the passenger is 77kg.
b) What would the final velocity be, in m/s, if the car with the 77kg passenger had collided with (and stuck to) a car that has a mass equal to and is the opposite dierction at the same speed?