When you use a crowbar to lift a large rock, you are working against the force called a. newton’s c. gravity b. joules d. normal

C. Gravity

Explanation:

While an object is at rest the only force acting upon it is the force due to gravity of Earth. Gravitational force is the force exerted by two objects on each other. Here the Earth is applying the gravitational force on the rock. This force is given as,

So to lift the rock one need to work against the force of gravity.

v 154.9= 0.9 length length s little over 154.9cm

15.3 cos 65 degrees trig