The brakes on a 1600 kg car exert a stopping force of 640 N. The car’s velocity changes from 20.0 m/s to 0m/s. What is the car’s initial momentum?

To a of 4 x hz is 1. 0. mm nm nm

The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.

The diagram shows a boulder rolling down a hill into a valley and then up the opposite hill. at which position does the boulder have the greatest kinetic energy? ab c d