1.   If a body is falling from rest, does the rate of acceleration change?

2.   A free-fall parachutist jumps from an aeroplane, and falls 80 m in just 4 s. Assuming he accelerates uniformly downwards and starts from rest:
    How fast is he falling at the very end of the 4 s time period?

A trolley is released from rest down a constant slope, and travels 0.80 m in 1.0 s. The acceleration of the trolley is:
A 0.78 ms^-2 B 1.6 ms^-2 C 3.2 ms^-2 D 9.8 ms^-2