If a student pushes a box horizontally with a force of 300 N for a distance of 20 meters, how much work has he done?

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

A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m

Acar moves a distance of 50.0 km west, followed by a distance of 64.9 km north what was the magnitude of the displacement of the car, in units of kilometers?