posted by jenny on .
A small ball rolls horizontally off the edge of a tabletop that is 1.2 m high. It strikes the floor at a point 1.52m horizontally away from the edge of the table. a) How long is the ball in the air? b) What is the speed at the instant it leaves the table?
I don't understand which equation I would use to solve this problem.
How long does it take to fall 1.2 m?
d= 1/2 g t^2.
solve for time.
Now, that is the same time it took to go 1.52 m horizontally, solve for speed.
wow - so obvious lol, thank you bob ;)
A ball travelling with a speed 10ms^-1 rolls off a horizontal table of 1.0metre high ignoring air resistance,calculate the magnitude of the vertical component of the velocity of the ball as it reach the ground