From the top of a cliff, a person uses a slingshot to fire a pebble straight downward, which is the negative direction. the initial speed of the pebble is 6.11 m/s. (a) what is the acceleration (magnitude and direction) of the pebble during the downward motion? (b) after 0.503 s, how far beneath the cliff top is the pebble?

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

What must be the same for any two resistors that are connected in series ? a. the potntial diffrence across each b. the rate at which charge moves through each c. the rate at which energy is used by each d. the resistance to the flow of charge of each

Acar moves at 12m/s and coasts up a hill with a uniform acceleration of -1.6m/s2. how far has it traveled after 6.0s?