Acar takes 8s to increase its velocity from 10m/s to 30m/s. what is its average acceleration ?

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)