1) If a person is mowing the lawn, and they are pushing on the lawnmower handle (that makes an angle of 29.4with the lawn), how much work do they do on the lawnmower if they walk 478 m and are pushing with a force of 230 N?

2)What is the speed of a 6.38 kg object if it has a kinetic energy of 467 J?

3) A heavy rock is dropped from a vertical distance of 27.6 m above the ground. What is its speed when it hits the ground?

4) An 81.2 kg object is pushed to the top of an incline that makes an angle of 15.4with the horizontal. If the incline is 20.0 m long, and the force applied along the incline is 254 N, what is the potential energy of the object at the top of the inclline, with respect to the bottom of the incline?