Week 4 quiz1

course Phy231

2/23 2pm

A projectile leaves the edge of a table and, while traveling horizontally at a constant 28 cm/s, falls freely a distance of 80 cm to the floor. If its vertical acceleration is 980 cm/s2, how long does it take to fall and how far does it travel in the horizontal direction during the fall?vertical

'ds=80cm

a=980cm/s^2

v0=0cm/s

vf^2=v0^2+2a'ds

vf=+-'sqrt(0^2+2*980cm/s^2*80cm)=396cm/s

'dt=(0cm/s-396cm/s)/-980cm/s^2=.4s

You didn't include the answer to the second question about horizontal displacement.

I'm confident you can find this, but if you aren't sure please submit a revision. The answer would be 11.2 cm.