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A 40N force pulls a 4kg block a horizontal distance of 8m The rope makes an angle of 35 degrees with the floor and the kinetic friction is equal to 0.2 What is the work done?
Wiki User
∙ 11y ago
The horizontal component of 40N at 35° is 40 cos(35°) = 32.7661 N (rounded)
The friction is irrelevant, and so is the mass of the block. I'm not sure that all the
given numbers even add up ... a 4Kg block sitting on a friction coefficient of 0.2
might not need 32.7661 N to slide it along the floor, or it might need more than that.
We don't care. All we need in order to calculate the work is the force and the distance.
Force = 32.7661 N
Distance = 8 m
Work = (force) x (distance) = 262.1287 Joules(rounded)
The vertical component of the 40N just goes along for the ride, and it doesn't do
any work. We know that because the front of the block doesn't lift up off the floor,
so the vertical component doesn't move through any vertical distance.
Wiki User
∙ 11y ago
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What is the frictional force that opposes the motion of two surfaces sliding past each other?
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How is static friction and kinetic friction differ from each other?
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Which type of kinetic fiction is usually greater sliding kinetic friction or rolling kinetic friction?
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What are the 2kinds of friction?
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Is kinetic friction the hardest friction to overcome?
No, static friction is generally stronger than kinetic friction.
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It wouldn't accelerate. It would move at a constant velocity due to its tendency to keep moving (inertia) and friction being canceled out by the horizontal force.
What is the frictional force that opposes the motion of two surfaces sliding past each other?
Friction.
How is static friction and kinetic friction differ from each other?
They are different because static means "not in motion" and kinetic means "in motion". Kinetic friction means friction that is moving and static friction means friction that is not moving.
Why kinetic friction is less than sliding friction?
there is more surface area contact with kinetic friction as opposed to sliding friction
When a body slides over a surface the kinetic friction and static friction related as?
Kinetic friction is the friction that applies when an object is moving; static friction is the friction that applies when the object is not moving. Static friction must always be greater than, or equal to, kinetic friction.
What is the force that keeps you from sliding on an icy sidewalk kinetic friction static friction?
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Sliding kinetic friction or rolling kinetic friction?
need more information, please
