What is true about a circular orbit? a. it is a special kind of elliptical orbit b. it is the same as an elliptical orbit. c. it has no kinetic energy. d. it has no potential energy.

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?

A2000 kg car is rounding a curve of radius 200 m on a level road. the maximum frictional force the road can exert on the tires of the car is 4000 n. what is the highest speed at which the car can round the curve?

If you put a helium-filled balloon in the refrigerator, what will happen?