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## Homework Statement

A transfer car moves concrete slabs.

Given values are wheel diameter D, shaft diameter d, rolling resistance F

_{L}, speed v, car weight m

_{v}, load weight m

_{k}, output power P at rotation speed n, average torque M

_{m}, motor moment of inertia J

_{m}, fan moment of inertia J

_{t}and efficiency of the mechanical transmission system η.

a) Calculate start-up acceleration and distance (up to maximum speed).

b) Calculate the torque of the driving shaft of the gear at start.

## Homework Equations

None given... (this is the main problem). I am studying a course abroad which has support material in a foreign language.

I have found these so far:

P=M

_{m}⋅ω

a=R⋅α

α=dω/dt

## The Attempt at a Solution

I have tried to find the angular acceleration using power, torque, radius and speed, however, these don't work in the start-up case since v=0. As for torque, I think I first need to find the acceleration and the just input into torque=moment of inertia⋅angular acceleration

I also don't know how and what forces to sum to calculate the torque.