Answer:
Explanation:
From the question we are told that:
Mass 
Radius 
Angular velocity 
Radial force of 
Kinetic coefficient of friction 
Generally the equation for Kinetic Force is mathematically given by
Generally the equation for Torque on Center is mathematically given by
Where
Therefore
Therefore Angular acceleration of the grindstone is
Every body continues in a state of rest or uniform motion in a straight line unless acted on by a resultant external force. That's approximately Newton's first law of motion.
So, the velocity of something tends to remain the same, unless an external force changes it. This is sometimes called "inertia". A body at rest, as in with "no velocity" will tend to remain at rest, unless there's a force on it. inertia again.
Answer:
Explanation:
2) From F=ma
Force =15×40=600N or kgm/s2
3)From the same equation making acceleration the subject of the formula will give
a=f÷m
=24÷4=6m/s2
4)m=f÷a
=45÷15=3kg
