An object with a mass of 5kg is moving with an initial velocity of 20m/s. the object accelerates at a rate of 15m/s/s for 8s. what is the net force on the ball during acceleration?

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

To a of 4 x hz is 1. 0. mm nm nm