Aaron lifts his 4.4kg backpack 1.5 meters of the ground .how much work did he do on the pack

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

The charge on an electron is 1.60218 × 10−19 c and its mass is 9.10939 × 10−31 kg. how strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.5 cm? answer in units of t.