girlfriend on the sled. The combined weight of the girl + sled is
630. N. According to theory, it takes more force to start an object
in motion than it takes to keep it in motion. Therefore, there is a
critical applied force required to overcome static friction and to
start the girl's motion. (a) If the coefficient of static friction
is 0.140, find this critical applied force for both cases. (ie he
will have to push, or pull will a force greater than or equal to
the amount you find, to start her in motion) Hint: All components
of this problem are similar. Keep in mind that you will simply need
to make modifications to the original equations and force tables of
part (a) for subsequent parts.
- In The Situations To The Right The Guy Can Push Or Pull His Girlfriend On The Sled The Combined Weight Of The Girl S 1 (255.26 KiB) Viewed 40 times
2. If the coefficient of kinetic friction is 0.100, and he can
push or pull with a force of 120.0 N, finder her acceleration in
both cases. Case (a), push? and Case (b), Pull?
3. Once they have traveled 2.00 m, he begins to get tired and
decreases his applied force. At that point, just before he does,
what is her velocity in both cases. Case (a), Push? and Case (b),
Pull?
(a) (b) F 30° 30° P Za S