Janet jumps off a high diving platform with a horizontal velocity of 1.57 m/s and lands in the water 2.5 s later. How high is the platform?
The acceleration of gravity is 9.8 m/s 2 .
Answer in units of m
If you are using physics formulas then use
s=ut+1/2×at^2
Horizontal velocity is irrelevant.
vertical velocity is 0
Vertical accel= -9.8
Vertical Velocity=-9.8t
Vertical disp=-9.8/2 t^2
When t=2.5
Vert dis = -4.9×2.5^2
Height=4.9×6.25 metres
