(1) What is the magnitude of the net force on a skydiver in N when an 810 N gravitational force and a 750N force of air resistance act on him? Fn = 810 Fg = 750 810 - 750 = Fm 60N (2) A 1200 kg car is moving in a staright line at a constant speed of 15m/s when the brakes are applied. The coefficeient of friction between the car and the road is 0.25. How far in m does the car travel after the brakes are applied? Fn = 1200*9.8 F = u*Fn = 2940N -F = m*a a = -F/m = -2940/1200 = -2.45m/s^2 Vf^2 = Vi^2 +2a*deltaX 0 = Vi^2 +2adeltaX -Vi^2/2a = deltaX = -15^2/-2.45 = 45.92m 4.) A car moves in a circle of 30 m radius. It moves with constant speed and makes one complete revolution in 22s. What is its speed in m/s? A = V^2/r that's all I have for this problem.. can you guys help me out with this? Also, are my answers for 1 and 2 correct?