What is the formula of work done by frictional force?
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What is the formula of work done by frictional force?
$W = Fd\cos \theta $, where $F$is the force applied, $d$is the displacement and $\theta $is the angle between the two. Here, the body is moving opposite to the direction of the frictional force. So, the work done by the frictional force in the given displacement of the body is $ – 50\mu kJ$.
Does kinetic friction do work?
Generally work done by the kinetic friction on an object is negative because the displacement is always opposite the friction force. But in some cases can be positive or zero.
Is the work done by kinetic energy equal to friction?
We apply the work-energy theorem. We know that all the car’s kinetic energy is lost to friction. Therefore, the change in the car’s kinetic energy is equal to the work done by the frictional force of the car’s brakes.
What is relation between work done by a force and kinetic energy?
The work-energy theorem states that the net work done by the forces on an object equals the change in its kinetic energy.
What is work done against friction?
The work done against friction is the work done on an object that overcomes this frictional force allowing the object to move – it doesn’t include any extra work used to accelerate an object for example – only the work used to beat the frictional force.
What is the work done by static friction?
due to friction between them. The free body diagrams of both the blocks is shown below. Work done by static friction on A is positive and on B is negative.
Is work done against friction work done by friction?
That means that the work done on it by the falling mass was counteracted by friction so that all the energy supplied to the block is dissipated by friction. The work done against friction is equal to the difference between the potential and kinetic energies you measured above.
Is Ke equal to work done?
In other words, the work done is equal to the change in K.E. of the object! This is the Work-Energy theorem or the relation between Kinetic energy and Work done. In other words, the work done on an object is the change in its kinetic energy. W = Δ(K.E.)
How do you find the work function given kinetic energy and frequency?
- We can use this information to experimentally determine the work function of a material. To begin, let us rearrange the maximum kinetic energy formula to solve for 𝑊 : 𝑊 = ℎ 𝑓 − 𝐸 .
- Now recall the electron kinetic energy equation, 𝑊 = ℎ 𝑓 − 𝐸 . m a x.
- Finally, we can make the substitution for frequency: 𝑊 = ℎ 𝑐 𝜆 − 𝐸 .
Can kinetic friction do work?
Is work done by static friction negative?
Work done by static friction on A is positive and on B is negative. Was this answer helpful?
What is the work done against friction?
How is work done related to kinetic energy?
Can work done by kinetic friction be 0?
Work done by kinetic friction on a body is never zero.
Can work done by kinetic friction be positive?
The work done by kinetic friction on an object is always negative.
Is work done by static friction zero?
Work done by static friction is always zero.
