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September 23, 2014

September 23, 2014

Posted by **Anonymous** on Thursday, March 22, 2012 at 6:38pm.

2. You throw a plate off your roof with a speed of 10.0 m/ s. 4 seconds later it hits the ground? How far?

3. You throw a baseball straight up at 40 m/ s and it reaches its peak after 4 seconds. What is its speed when it falls back into your hand? What is it displacement? What distance has it traveled?

- Physics -
**bobpursley**, Thursday, March 22, 2012 at 6:53pmhf=hi+vi*t+1/2 gt^2

g=-9.8m/s^2

in the first, hf=0,hi=?, vi=0

in the second, vi=-10,hf=0, hi=?

in the third, the velocity at the top is zero.

Vf=vi+gt

vf=40-9.8(8)

displacement =0 if it returns to your hand.

distance? twich the height..

hf=hi+40*t+1/2 g t^2 g=-9.8m/s^2

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