If an object is moving at a constant speed in one direction, what is needed to change its speed or direction? .

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

**urgent** roberto plans to use two transformers to reduce a voltage of 120 v to 4 v. he uses a transformer that has 300 coils in the primary winding and 50 coils in the secondary winding. he has four other transformers, as listed in the table. which transformer should roberto use to have an ending voltage of 4 v? a- w b-xc- yd- z

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?