A car moving at 8.5 m/s crashes into a tree and stops in 0.32 s. Calculate the magnitude of the force, in newtons, the seatbelts exerts on a passenger in the car to bring him to a halt. The mass of the passenger is 66.5kg.

The motor m applies a time-varying force of f (200 t) n, where t is in seconds. box b with mass 200 kg starts from rest, and the coefficients of kinetic and static friction are 0.2 and us 0.3 the acceleration due to gravity is g 9.8 m/s2 b 300 a) find the time ' when the box starts to move. b) calculate the speed of the crate at 3 s c) calculate the power delivered by the motor at t 3 s

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

It is really hard for me right know