Atrain travels 90 kilometers in 4 hours, and then 82 kilometers in 1 hours. what is its average speed?

How are momentum and impulse related? impulse is a whim to do something, while momentum keeps it going impulse is another name fore instantaneous momentum the impulse acting on and object is equal to the change of momentum it causes. the impulse that acts on and object is the momentum that results.

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form