The maximum number of paperclips the magnet could hold was 20. Each paperclip had the mass of 1.0g and gravitational field strength of 9.8. Calculate the maximum force it could exert.

After a big snowfall, you take your favorite rocket-powered sled out to a wide field. the field is 195 m across, and you know that your sled accelerates at a rate of 3.65 m/s2 when the rocket is on. how much time will it take the sled to cross the field starting from rest, assuming the rocket is on the whole time?

A20 cm long spring is attached to a wall. the spring stretches to a length of 22 cm when you pull on it with a force of 100 n. what is the spring constant

The energy equivalent of the rest mass of an electron is