2. A stone is thrown upwards with an initial velocity of 25 m/s at an angle of 30° to the ground.
a) Show that the vertical component of the velocity at the start
is 12.5 m/s upwards.
b) Without doing any calculations, state what the stone's
vertical velocity will be when it again reaches ground level.
c) Using the answer to a), show that the stone will rise to a
height of about 8 m.
d) How long will it take for the stone to reach its maximum
height?
e) How long will it take between when the stone was thrown
and when it comes back to the ground?
f) Explain why the horizontal component of the stone's
velocity at the start is 21.7 m/s.
g) What will the stone's horizontal velocity be just before it lands?
h) Use the answers to parts e)-g) to work out the stone's
horizontal range.