Tuesday
December 10, 2013

# Posts by physics

Total # Posts: 358

physics
A rope of negligible mass passes over a puley of a negligible mass attached to the ceiling. One end of the rope is held by stdent A of mass 70 kg who is at rest on the floor. The opposite end of the rope is held by student B of mass 60 kg who is suspended at rest above the flo...

Physics
not sure what the force of tension is equal to in this problem

Physics
Tarzan plans to corss a gorge by swinging in an arc form a hanging vine. If his arms are capable of exerting a force of 1400 N on the rope, what is the maximum speed he can tolerate at the lowest point of his swing? his mass is 80 kg and the vine is 4.8 m long. Ok If i\'m ...

physics
centripetal acceleration= friction m*w^2 r = mu*mg changing 50 rpm to rad/sec mu=w^2 r/g=(50*2PI/60)^2 * .12 which is not your answer. Check my thinking. ok I thought centripetal force was equal to m ac were ac is the centripetal acceleration which is equal to v^2 divided by r...

Physics
A coin is placced 12.0 cm from the axis of a roatating turntable of variable speed. When the speed of the turntable is slowly incraeased, teh coin remains fixed on the turntable until a rate of 50 rpm is reached at which point the coin slides off. What is the coefficent of sta...

Physics
A coin is placced 12.0 cm from the axis of a roatating turntable of variable speed. When the speed of the turntable is slowly incraeased, teh coin remains fixed on the turntable until a rate of 50 rpm is reached at which point the coin slides off. What is the coefficent of sta...

physics
Net Force Radial = m a radial = F radial = Ffr ma radial = Us Fn ma radial = Us m g cancel out mass a radial = Us g a radial = r^-1 v^2 r^-1 v^2 = Us g Us = (rg)^-1 V^2 don\'t see what I did wrong

physics
A coin is placced 12.0 cm from the axis of a roatating turntable of variable speed. When the speed of the turntable is slowly incraeased, teh coin remains fixed on the turntable until a rate of 50 mph is reached at which point the coin slides off. What is the coefficent of sta...

physics
so there is no static friction when a block is just sitting there and not moving with no applied force?

physics
what is the equal and opposite force the force of friction like if a block is at rest on a table static friction is stil exerted by the table onto the block keeping it from moving what is the equal and opposite force of this force?

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