A pine tree growing on a hillside makes a 75 degrees75° angle with the hill. From a point 8383 feet up the hill, the angle of elevation to the top of the tree is 64 degrees64° and the angle of depression to the bottom is 23 degrees23°. Find, to the nearest tenth of a foot, the height of the tree.

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.

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

In automobile steering wheel is shown what is the ideal mechanical advantage blank? if the ama is eight what is the efficiency of the steering wheel?