An elevator cable winds on a drum of radius 771 cm that is connected to a motor. If the elevator moves down 8.60 m, how many revolutions has the drum made?

The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.

What object a collides with object b and bounces back its final momentum is?

What is the relationship between the direction of motion of the balloon and the wind currents