Find a for this system
Two bodies move as one mass w/ one accel.
Fnet = ma
Let's make clockwise +
Mg = (m + M)a
The 2 masses get their accel. from hanging mass
Applies only for frictionless surface
| Mg | = | a |
| (M+m) |
What would the accel. be if
the little mass was hanging?
| mg | = | a |
| (M+m) |
What is the tension force of rope?
SFx = ma
Tf = ma
Rule - One Rope, One Tension
Let's make clockwise +
Tension in terms of M
ΣFy=Ma Mg - Tf = Ma Mg - Ma = Tf |
Tf = M(g - a)
If Box on table had friction
coefficient of friction = μ
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