what is the mechanical advantage of using the ramp, as opposed to lifting the gurney straight up? (ignore any effects of friction.)

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?