A block is at rest on a horizontal plank. If you lift up one end of the plank and slowly raise it up, what happens to th

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A Block Is At Rest On A Horizontal Plank If You Lift Up One End Of The Plank And Slowly Raise It Up What Happens To Th 1 (10.44 KiB) Viewed 47 times

A Block Is At Rest On A Horizontal Plank If You Lift Up One End Of The Plank And Slowly Raise It Up What Happens To Th 2 (13.45 KiB) Viewed 47 times

A Block Is At Rest On A Horizontal Plank If You Lift Up One End Of The Plank And Slowly Raise It Up What Happens To Th 3 (16.27 KiB) Viewed 47 times

A block is at rest on a horizontal plank. If you lift up one end of the plank and slowly raise it up, what happens to the coefficient of static friction between the plank and the block? The coefficient is smaller. The coefficient doesn't change. More information is needed. The coefficient gets larger.
A box slides down a ramp and then onto the floor. The ramp and the floor are made of the same material. Which frictional force has a larger magnitude, the force exerted on the box by the ramp, or the force exerted on the box by the floor? O the two frictional forces have the same magnitude more information is needed the frictional force exerted by the ramp the frictional force exerted by the floor
An object is on a horizontal surface. The only horizontal forces acting on it are a northward-directed force F north, and a southward directed force F south- Which statement is true? If Fnorth = Fsouth at a given instant, then the object must be at rest for at least that instant. O If Fnorth <Fsouth at a given instant, then the object must be moving south at that instant. If Fnorth> Fsouth at a given instant, then the object must be moving north at that instant. None of the other statements are true.