Freefall

A pebble, released from rest from a canal bridge took 0.9s to hit the water. Calculate the distance it fell before hitting the water. Give your answer to 2 sig figs.

Mathematical Equivalence

ON

A pebble, released from rest from a canal bridge took 0.9s to hit the water. Calculate its speed just before hitting the water (2 s.f.).

Mathematical Equivalence

ON

A spanner was dropped from a hot air balloon when the balloon was at rest 50m above the ground. Calculate the time taken for the spanner to hit the ground. (2sf)

Mathematical Equivalence

ON

A spanner was dropped from a hot air balloon when the balloon was at rest 50m above the ground. Calculate the speed of impact of the spanner on hitting the ground (2sf).

Mathematical Equivalence

ON

A bungee jumper jumped off a platform 75m above a lake, releasing a small object at the instant she jumped off the platform. Calculate the time taken by the object to fall to the lake. (2sf)

Mathematical Equivalence

ON

A bungee jumper jumped off a platform 75m above a lake, releasing a small object at the instant she jumped off the platform. Calculate the speed of the object on hitting the water, assuming air resistance is negligible (2sf).

Mathematical Equivalence

ON

Would the bungee jumper take a longer or shorter time to descend to the water surface and why?

• Longer as the bungee jumper is heavier.

• Shorter as the bungee jumper is heavier.

• Longer because the elastic rope will slow down the bungee jumper.

• Same because air resistance is negligible.