2.
An engine of mass 3 tonnes experiences a resistance force of 2000N whilst driving along a straight horizontal
track. The engine provides a forward force of
6000N and it is pulling a carriage of mass 1.5 tonnes which
itself
experiences a resistance force, R newtons. Given that the engine is accelerating at 0.5ms-2
a) Find the resistance force, R, acting on the carriage.