5
A metal ball is dropped into a tall cylinder of oil. The ball initially accelerates
but soon reaches a terminal velocity.
a) By considering the forces on the metal ball bearing, explain why it first
accelerates but then reaches terminal velocity.
b) State how you would show that the metal ball reaches terminal velocity.
Suggest one cause of random errors in your readings.
Question 6
Determine the speed in m s-1 of an object that travels:
a)3.0 μm in 5.0 ms
b)6.0 km in 3.0 Ms
c)8.0 pm in 4.0 ns.
