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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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A 5.0 kg block of ice at -1.5C slides on a horizontal surface with a coefficient of kinetic friction equal to 0.058 The initial speed of the block is 6.0 ms and its final speed is 5.5 ms.?
The work done by kinetic friction is responsible for the decrease in kinetic energy, leading to the block's speed reduction. You can calculate the work done by friction using the equation Work = Force * distance. By setting the work done by friction equal to the change in kinetic energy, you can find how far the block slides before coming to a stop.
What are the 2kinds of friction?
Static Friction and Kinetic Friction. Static Friction is what friction that slows you down. While Kinetic friction is sliding friction.
How is static friction and kinetic friction differ from each other?
Static friction occurs when an object is at rest on a surface, preventing it from moving. Kinetic friction occurs when an object is already in motion on a surface, resisting its motion. Static friction is usually stronger than kinetic friction.
What is the frictional force that opposes the motion of two surfaces sliding past each other?
Friction.
What is the formula for the coefficient of kinetic friction?
The formula for the coefficient of kinetic friction is μk = Fk/N, where μk is the coefficient of kinetic friction, Fk is the force of kinetic friction, and N is the normal force. The coefficient of kinetic friction represents the level of resistance between two surfaces in contact while they are in motion.
What is the coefficient of kinetic friction between the 13.0kg wooden crate and the horizontal force of 31N of the floor?
The coefficient of kinetic friction can be calculated using the formula: coefficient of kinetic friction = force of kinetic friction / normal force. The force of kinetic friction can be found using the formula: force of kinetic friction = coefficient of kinetic friction * normal force. Given the force of 31N and normal force equal to the weight of the crate (mg), you can calculate the coefficient of kinetic friction.
Which type of kinetic fiction is usually greater sliding kinetic friction or rolling kinetic friction?
Sliding Kinetic Friction is usually greater than Rolling Kinetic Friction. Sliding Kinetic Friction is caused by two objects being dragged together, providing more opportunity for the objects' microscopic hills and valleys to catch.
What are the 2kinds of friction?
Static Friction and Kinetic Friction. Static Friction is what friction that slows you down. While Kinetic friction is sliding friction.
Is kinetic friction the hardest friction to overcome?
No, static friction is generally stronger than kinetic friction.
What is kinetic friction and sliding friction?
Kinetic friction is the friction that arises between surfaces in relative motion. Sliding friction is the friction that occurs when an object slides over a surface.
How can an object accelerate if kinetic friction is equal and opposite to horizontal force which would mean it has a net force of zero?
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?
Static friction occurs when an object is at rest on a surface, preventing it from moving. Kinetic friction occurs when an object is already in motion on a surface, resisting its motion. Static friction is usually stronger than kinetic friction.
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?
The force that keeps you from sliding on an icy sidewalk is static friction. Static friction acts when two surfaces are in contact with each other but not moving relative to one another. Once you start moving, the force of kinetic friction takes over to oppose the motion.
What is sliding kinetic friction?
Sliding kinetic friction is when two moving (kinetic) objects rub (slide) against each other, creating friction. Sliding friction creates heat, unlike rolling or fluid friction.
