A 10 kg clay ball with a speed of 10 m/s to the east, explodes into two pieces.
One piece of mass 5 kg has a speed of 5 to the west. The momentum
of the second piece is kgm/s.

a 100
b 75
c 125
d 225
e 140

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same