Week4Quiz1Vers1

course phy 121

2/15 at 11:45 a.m.

A projectile leaves the edge of a table and, while traveling horizontally at a constant 37 cm/s, falls freely a distance of 149 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?

'ds=1.49 m

a=9.8 m/s^2

v0=0

'ds=v0'dt +.5a'dt^2

'ds=.5(9.8m/s^2)'dt^2

'dt='sqrt(2'ds/a)= 'sqrt(2*1.49m/9.8 m/s^2)= .55 sec. approx.

.37 m/s *.55 sec. = .20 meters in this time"

&#This looks very good. Let me know if you have any questions. &#