A car of mass accelerates from speed to speed while going up a slope that makes an angle with the horizontal. The coefficient of static friction is , and the acceleration due to gravity is . Find the total work done on the car by the external forces.

The three ropes in the figure are tied to a small, very light ring. Two of the ropes are anchored to walls at right angles, and the third rope pulls as shown. What are and , the magnitudes of the tension forces in the first two ropes?

1. A country has a comparative advantage when it can 1. produce more of a product than another country 2. produce a lot of different economic products 3. produce a good at a lower dollar cost than another country 4. produce a good at a lower opportunity...

Gun A rail gun uses electromagnetic forces to accelerate a projectile to very high velocities. The basic mechanism of acceleration is relatively simple and can be illustrated in the following example. A metal rod of mass 50.0 and electrical resistance 0.100 rests on parallel horizontal rails...

What is the effect on the net public debt with a balanced budget

Learning Goal: To understand the concept of tension and the relationship between tension and force. This problem introduces the concept of tension. The example is a rope, oriented vertically, that is being pulled from both ends. Let and (with u for up and d for down) represent the magnitude...