Starting from rest a 65kg biker achieves a speed of 14.5m/s in 9 seconds. What is the net force on the biker? А 0 N
B. 105 N
C. 8,483 N
D. 0.024 N

List one type of erosion and describe how it happens?

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block

The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaρv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and ρ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and ρ = 1.2 kg/m3.