1)a small coin is dropped down a well.the splash is heard 2.3s later.how deep is the well?I(assuming sound travels quickly enough for any delaying effect to be ignored)
2)a stone is thrown upwards from the top of a tower 85m high.it reaches the ground in 5 seconds.calculate
1)the greatest height above the ground.
2)the velocity with which it reaches the ground.
3)time taken to reach maximum height(g=10ms^2)
3)a stone falls freely under gravity,starting from rest.calculate the ratio of distance,travelled by the stone during the first half of any interval of time to the distance travelled during the second half of the same interval