A tractor of mass 5.0 × 10³kg is used to tow a car of mass 2.5 × 10³kg. The tractor moved with a speed of 3.0m/s just before the towing rope became taul, calculate the;speed of the tractor immediately the rope becomes taul, loss kinetic energy of the system just after the car has started moving,,impulse in the rope when jerbs it in the car into motion.

The diagram shows a person using a piece of gym equipment to lift weight which best describe the body in terms of simple machine

The experiments with static charges were done by:

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)