12 A uniform ladder rests against a vertical wall where there is negligible friction. The bottom of the ladder rests on rough ground where there is friction. The top of the ladder is at a height h above the ground and the foot of the ladder is at a distance 2 a from the wall.The...
A ladder 10 ft long rests against a vertical wall.If the bottom of the ladder slides away from the wall at a rate of 1.5 ft/s,how fast is the angle between the ladder and the ground changing when the bottom of the ladder is 8 ft from the wall?answer ___rad/s 相关...
is pointingupwards.Since there is also a normal contact force by the wall on the ladder, the totalcontact force by the wall on the ladder is to the right and upwards.The ladder tends to slide to the right, so the frictional force by the floor on the ladder ispointing towards the left...
12 A uniform ladder length L rests against a vertical wall where there is negligible friction. The bottom of the ladder rests on rough ground where there is friction. The top of the ladder is at a height h above the ground and the foot of the ladder is at a distance 2 a from the...
tlong rests against a vertical wall. If the bottom of the ladder slides away from the wall at a rate of0.9fts,how fast(in rad/s)is the angle(in radians)between the ladder and the ground changing when the bottom of the ladd...
leaning against a vertical wall with its feet on the ground. The middle rung of the ladder has been painted a different colour on the side, so that we can see it when we look at the ladder from the side on. What shape does that middle rung trace out as the ladder falls to the ...
A uniform ladder of weight W rests in equilibrium with one end on rough horizontal ground and the other resting against a smooth vertical wall. The vertical plane containing the ladder is at right angles to the wall and the ladder is inclined at 60°to the horizontal. The coefficient of fr...
1 A uniform ladder 7.10m long weighing 500N rests with one end on the ground and the other end against a perfectly smooth vertical wall.The ladder rises at 55.0∘ above the horizontal floor.A 800N painter finds that she can climb 2.95m up the ladder,measured along its length,before ...
A uniform ladder stands on a rough floor and rests against a frictionless wall as shown in the figure. WL=58.0N, and rests against the wall a distance d=3.75m above the floor. If a person with a mass of m=90kg is standin...
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