A ball id thrown horizontally at 21 m/s from a clifftop 60m above sea level. (secondary 5 physics)
Find:
a)the time to land
b)the angle at which it hits the water
c)the speed at which it hits the water

Question

A ball id thrown horizontally at 21 m/s from a clifftop 60m above sea level. (secondary 5 physics)
Find:
a)the time to land
b)the angle at which it hits the water
c)the speed at which it hits the water

anonymous · Answer

what did you come up with?

anonymous · Answer

Use$$y - y _{0} = v _{0y} + 1/2 g t ^{2}$$
for part a.

anonymous · Answer

$$v _{0}t = 0$$ because it is in the y direction. g = 9.8 m/s2
and y - y0 = 60m

anonymous · Answer

Use $$v = v _{0} + g t$$ for the speed at which it hits the water? This is only considering the downward motion so v0 = 0 m/s