One Hint— As rake angle increases tool gets thinner, but do also think about Force.
Now try to answer.

Gate 2020 response sheet is out officially.

#Interview #concept

Take assumption oxygen is present. (To burn O2 is a must)

In Metal cutting
If higher value of Shear angle is given then it means the cutting force will be automatically lower and the shear plane will be smaller, inturn less power is required, so it will produce less heat i. e easier machining.


#Funda #Production

In general in any term where specific is used with for example - Specific weight(Weight/Volume),
So Specific power can be interpretated as Power consemed per unit volume.
So its unit will be J/mm^3.

Even if cutting velocity is unkown we will be able to find out SEC by Fc/(1000*f*d)

1000 was multiplied to convert Velocity from m/s to mm/s.

Since Torque is applied in anticlockwise direction in the rear wheel by the paddle so the friction which is just a reaction force acts opposite to the action i.e forward direction.
Since no action is directly on the front wheel we will treat it as static body and friction will acts backwards.

Try to solve without calci

#fun #funda