A lawn mower has a flat, rod-shaped steel blade that rotates about its center. The mass of the blade is 0.65 kg and its length is 0.55 m. You may want to review (Pages 314 - 318) . Part A What is the rotational energy of the blade at its operating angular speed of 3510 rpm

Complete Question

A lawn mower has a flat, rod-shaped steel blade that rotates about its center. The mass of the blade is 0.65 kg and its length is 0.55 m. You may want to review (Pages 314 - 318) .

Part A What is the rotational energy of the blade at its operating angular speed of 3510 rpm

Part B

If all of the rotational kinetic energy of the blade could be converted to gravitational potential energy, to what height would the blade rise?

Part A  

Part B  

Explanation:

From the question we are told that

  The mass of the blade is  

   The length is  

   The angular speed is  

Generally the moment of inertia of the of this mower is mathematically evaluated as

substituting values

Generally the rotational kinetic energy of the bland is  

substituting values

At point where the gravitational potential energy is equal to the rotational kinetic energy  we have that

Where P is the  gravitational potential energy

substituting values

=>      

atomic = no of protons.

mass number-atomic number = neutron number