a 5 kg box slides a 10m distance on ice. if the coefficient of kinetic friction is .20, what is the work done by the friction force?
To find the work done by the friction force, we need to calculate the magnitude of the force first.
The friction force can be calculated using the equation:
Friction force = coefficient of friction * Normal force
The normal force can be calculated as the weight of the object on a horizontal surface, which is given by:
Normal force = mass * gravitational acceleration
= 5 kg * 9.8 m/s^2
= 49 N
Now, we can calculate the friction force:
Friction force = 0.20 * 49 N
= 9.8 N
The work done by a force can be calculated using the equation:
Work = force * distance
In this case, the distance is given as 10 m. So, we can use the equation:
Work = 9.8 N * 10 m
= 98 J
Therefore, the work done by the friction force is 98 joules.