a paintbrush falls from a scaffold takes 3 sec to hit the ground. How high is the scaffold? Explain pls!?
Its 3 seconds high, but you would need to know how heavy the paintbrush is, could be as heavy as an anvil dropping from a building. (The scaffold would be as tall as the building)
1) In three seconds the paintbrush accelerated to a speed of 96 feet/sec (ignoring air resistance) at a acceleration of 32 feet/sec/sec. 2) It started at a speed of zero, so the average speed for those three seconds was 48 feet/sec. 3) 3 seconds times 48 feet/sec. equals 144 feet.
