2 Points
What is the electric force acting between two charges of -0.0085 C and
-0.0025 C that are 0.0020 m apart?
k9,92
Use F
and k = 9.00 x 10°N-m/c2.

Abaseball has a mass of 0.145 kg and approaches a bat at 40.0 m/s. after it is hit, the ball leaves the bat at 50.0 m/s directly back. find the impulse of the bat on the ball. 7.25 kg*m/s 13.1 kg*m/s 5.80 kg*m/s 1.45 kg*m/s

Energy is the ability to do work which measures what

When you drop a pebble from height a it reaches the ground with speed v if there is no air resistance. from what height should you drop it so it will reach the ground with three times the speed? (a) 9m (b) 3m (c) 6m (d) 18m