A particle moving at 10 ms-1 West has a momentum of 1000 kg. ms-1 West, calculate the mass of the particle.

Aforklift raises a 1,020 n crate 3.50 m up to a shelf. how much work is done by the forklift on the crate? the forklift does j of work on the crate.

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.