a 50 kg box is initially at rest. a student applies a constant horizontal force 490 N to the box for a distance of 4.5 m. what is the speed of the box at the end of this motion?( assume no energy lost due to friction.)

Acar moves at 12m/s and coasts up a hill with a uniform acceleration of -1.6m/s2. how far has it traveled after 6.0s?

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?