1. A mass m moves without friction on the inclined surface of a wedge of mass M. The wedge in turn slides without friction on a horizontal surface (ground). The wedge is pushed (or pulled) by an external force F. (a) What is the force to keep M from moving? (b) What is the force required to keep m stationary with respect to the wedge? (Hint: Ncos0 = mg. Why?) (c) What is the minimal force to make m fall down vertically as viewed from the ground? (Hint: N is zero. Why?)
1. A mass m moves without friction on the inclined surface of a wedge of mass M. The wedge in turn slides without friction on a horizontal surface (ground). The wedge is pushed (or pulled) by an external force F. (a) What is the force to keep M from moving? (b) What is the force required to keep m stationary with respect to the wedge? (Hint: Ncos0 = mg. Why?) (c) What is the minimal force to make m fall down vertically as viewed from the ground? (Hint: N is zero. Why?)
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Transcribed Image Text:1. A mass m moves without friction on the inclined surface of a wedge of mass M.
The wedge in turn slides without friction on a horizontal surface (ground). The
wedge is pushed (or pulled) by an external force F. (a) What is the force to keep M
from moving? (b) What is the force required to keep m stationary with respect to the
wedge? (Hint: Ncos0 = mg. Why?) (c) What is the minimal force to make m fall
down vertically as viewed from the ground? (Hint: N is zero. Why?)
m
F, push
F, pull
M
Ground
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