Question

3-foot long rod is spinning around at 1750 rpm. Its diameter is 4-cm and it has amass of 9 kg There is a load of 5120 N acting on the

rod causing friction. The coefficient of friction is 0.15. The rod is made from cast iron. What will happen to its temperature (be as specific as you can be) b. Why is oil often used instead of water to combat friction?

Fig: 1

Fig: 2

Fig: 3