Why do stars appear to move across the sky?

For a machine, the input force is 30 N, and the input distance is 2 m. Factoring in the effect of friction, what must be true about the work output? A. It must be greater than 60 J B. It equals 60 J. C. It must be less than 60 J

How is electromagnetic energy from microwave transformed into heat energy?

How does a reflecting telescope work

In a polar convalent bond,

A 1904 kg car has a speed of 12 m/s when it hits a tree. The tree doesn't move and the car comes to rest. Find the change in kinetic energy of the car. Answer in units of J.

A submarine that is in the sea what principle is that

1. It takes 26.5 N to pull a 72 kg sled across snow. What is the coefficient of friction? 2. A 565 N rightward force pulls a large box across the floor with a constant velocity of 0.75 m/s. If the coefficient of friction is 0.

A person holds onto an object for 2 minutes, but doesn't move the object. Is work done on the object?

Which two vectors add together to give a resultant with the smallest magnitude, and which two vectors add to give a resultant with the largest magnitude? in each case specify the magnitude and direction of the resultant?

The largest velocity reached by a falling object is its