An object is 2.5 kgs and is traveling at a speed of 4.0 m/s. What is the objects momentum?

An ideal transformer has 60 turns in its primary coil and 360 turns in its secondary coil. if the input rms voltage for the 60-turn coil is 120 v, what is the output rms voltage of the secondary coil?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.