A boy uses a slingshot to launch a pebble straight up into the air. The pebble reaches a height of 29.0 m above the launch point 3.3 seconds later. Assume air resistance is negligible.

Answer 1

a) What was the pebble's initial speed (just after leaving the slingshot)?
b) How much time did it take for the pebble to first reach a height of 14.5 m above its launch point?

Answer 2

32

Answer 3

23