A physics student pushed a 50 kg box across the floor, accelerating it at a rate of 1.5 m/s^2. How much applied force was acting on the box of the frictional force was 25 N? Determine the new acceleration of the box if the mass was doubled? Please somebody actually help!

Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

Which describes increasing the efficiency of energy resource