Please help me answer my physics problem set

Work, Energy and Power 1. A girl with mass $5 kg slides 4m down an inclined plane as shown in the picture. a. Calculate the work done on the girl by gravity. b. Calculate the work done on the girl by the normal force. 2. A 5 kg block is pulled by a force of 60N at an angle of 30 degrees to 60N the ground. The block moves 3.25m. a. Calculate the work done by gravity. 30 b. Calculate the work done by the applied force. 5kg 3. A 1500 kg car is pulled 3m up an incline at angle of 30 degrees with the ground. The rope pulling the car has a tension of 7500 N. The car experiences a 20N frictional force. a. Draw a labelled free body diagram of all the forces O O acting on the car. b. Calculate the net work done on the car. O 4. A box of weight 50 N is pulled 2 m along a horizontal floor by a force of 10 N and then the box is lifted vertically through a height of 1 m What is the total work done on the box? 5. A film star in a car (together 720 kg) drives 4.8 m down an inclined plane as indicated in the picture. She starts from rest. The car experiences a frictional force of 23 N. 42" and the engine exerts a force of 200 N. Calculate the work done on the car by the engine.10. 11. L2 13. 14, 15. . Determine the kinetic energy of a 5300 kg car that is moving with a speed of 60my/s. If the wehicle were moving with twice the initial speed, then what would be its new kinetic energy' The floor of the basement of a house is 3.0m below the ground level, and the floor of the attic is &.0m above the ground level. What is the change in potential energy if a 3.5 kg object in the attic is brought to the basement? . A girl weighing 400 N runs up a flight of stairs of vertical height 5 m in 4 seconds. What is the increase in her gravitational potential energy? At what height above the ground must a mass of 10 kg be to have a potential energy equal in value to the kinetic energy possessed by a mass of 10 kg moving with a velocity of 20 m,5? A car moving at a speed of v has kinetic energy ,. If the speed of the car increases to dv, the kinetic energy will then be? What is the power output if 12N of force was applied on an object at an angle of 25 above the horizon to move an object 5 meters horizontally in 3 seconds. & person weighing 600 N gets on an elevator. The elevator lifts the person 6 m in 10 seconds, How much power was used? How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes? A man with mass 50kg is wearing a backpack of mass Skg and running up a hill with a slope of 30 degrees at a constant velocity of 2ms, What is the man's power output? An elevator of mass 1000kg has five passengers, each with an average mass of B0kg. The elevator accelerates from rest to a velocity of 3ms over & seconds. Determine the amount of work and powser