Projectile problems - help needed (1 Viewer)

Petinga

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1. An arrow is fired horizontally at the centre of a target 50 metres away. Unfortunately, the archer made no allowance for gravity, and the arrow hit 0.8 metres below centre. Find:
a) initial horizontal velocity
b) Intial vertical velocity
c) Intial velocity of projectile
d) its range
e) final horizontal velocity
f)final vertical velocity
g) final velocity
h) time taken to fall
i) height from which dropped/thrown
j) velocity 3 seconds after dropped
k) height 5 seconds after dropped

2. A projectile hits the centre of a target at an angle of 15 degrees to the vertical 15 seconds after being droppped from a helicopter. find:
a) initial horizontal velocity
b) Intial vertical velocity
c) Intial velocity of projectile
d) its range
e) final horizontal velocity
f)final vertical velocity
g) final velocity
h) time taken to fall
i) height from which dropped/thrown
j) velocity 3 seconds after dropped
k) height 5 seconds after dropped
 

Ghost1788

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i think you might be missing some info there...where did you get this question
 

helper

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There from surfing physics.
There isn't any missing info, it is worked out backwards from

uy/=0
delta y = 0.8
ay=9.8

calculate t, and then you can calculate ux etc.

I'm not in the mood to do all the working.
 

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