It takes 165,000 J of energy to accelerate a truck from a speed of 22 m/s to a speed of 27 m/s. What is the car's mass?

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?