If an object is moving at #50 m/s# over a surface with a kinetic friction coefficient of #u_k=2 /g#, how far will the object continue to move?
2 Answers
Explanation:
Because of kinetic frictional force,the object will undergo constant deceleration.
So,to find upto what length it will go,we can apply the relation between velocity (
i.e
Now, frictional force acting is
So, deceleration i.e
Putting in the equation and also putting
So,we get,
Or,
The distance is
Explanation:
The coefficient of kinetic friction is
The mass of the object is
The acceleration due to gravity is
The normal reaction is
Therefore,
According to Newton's Second Law
The acceleration is
The coefficient of kinetic friction is
The initial velocity is
The final velocity is
Apply the equation of motion
The distance is