A tow rope used to pull the car of mass `700kg` will break if the tension exceeds `1500N`.
a)Calculate the maximum acceleration with which the car can be pulled through a level road.
b)Calculate the minimum time required to bring the car to work station `500m` away from the break point.

We have common experience that a thin thread breaks if pulled at its ends. Also a thin metalic wire, when pulled at the ends elongates and then contracts, when released. A lift is tied with thick iron wires and its mass is 1000kg . What should be the minimum diameter of the wire if the maximum acceleration of the lift is 1.2m/s^2 and maximum safe stress of the wire is 1.4xx10^8N/m^2 (g= 9.8m/s^2 )