Hi guys,
need a bit of help with a project
i have to work out the power required for a motor in a hand blender, the hardest fruit i need to cut is an apple,
i put a long knife on the apple and a weight of 1.2kg on the knife cut the apple
using the equation for torque i get
Torque = r x F x sin(theta) r = distance from pivot of the knife to the cutting point on the apple F = force theta = angle at which force is applied perpendicular to r
so Torque = .31m x 1.2kg x 9.81m/s x sin(90) = 3.65 Nm
estimated time to cut the apple was 0.1s Power = Torque / time = 3.65 / 0.1 = 36.5 W
so I need a 36.5W motor to cut the apple,
why are the hand blenders on the market all 300-600 W ? are my calculations correct?
Thanks