A baseball (mass=0.14 kg) traveling 30 m/s moves a fielder's glove backward 30 cm when the ball is caught. What was the average force exerted by the ball on the glove?
something to do with (1/2)(m)(v²), me thinks...and it's supposed to be one of the easier questions, but I'm lost..
if someone could give me a lead or hint, that'd be great.
2007-01-15 17:06:36 · 3 answers · asked by Space Cadet 3 in Science & Mathematics ➔ Physics
The kinetic energy of ball is mv^2/2, suppose that all energy transform to work for moving glove we may find the average force:
A=mv^2/2, A=Fs, F=A/s
2007-01-15 19:07:02 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Close but no cigar. Use F=MA. The ball decelerates from 30 m/s to zero in 30 cm, so you know A and have M, so F just drops out.
2007-01-16 01:22:00 · answer #2 · answered by ZORCH 6 · 1⤊ 0⤋
mass=0.14kg
force=ma product of mass and acceleration
use eq v=u2-2as
v=0,u=30m/s s=.3m find out a
we get a as 150m/s
calculate f=ma
tats all
2007-01-16 01:15:39 · answer #3 · answered by sujmik 1 · 1⤊ 0⤋