A small sports car and a pickup truck start coasting down a 14 m hill together, side by side. Assuming no friction, what is the velocity of each vehicle at the bottom of the hill? Assume that energy losses due to friction are negligible for both vehicles. %3D Vear Vtruck

A volcanic ash flow is moving across horizontal ground when it encounters a 10 upslope. The front of the flow then travels 920 m up the slope before stopping. Assume that the gases entrapped in the flow lift the flow and thus make the frictional force from the ground negligible; assume also that the mechanical energy of the front of the flow is conserved.What was the initial speed of the front of the flow?

125% e + Problem 11: The atwood machine shown is released from rest. Using the work-energy theorem, find the speed of the 10 kg mass after it has fallen a distance of 1 meter. Assume the pulley is massless and there is no friction in the axel. 10 kg ल 5 kg Problem 12: A cube of mass m is initially at rest at the for inclined s which henn height

Ms. Dewitte's son, Theo, slides down a slide, from rest, with a length of 2.00 m at an incline of 50° above the horizontal. He has a mass of 22.0 kg and he reaches the bottom of the slide with a velocity of 2.90 m/s. Briefly explain if total mechanical energy was conserved and what energy transfers otcurred?

Systems and energy conservation

Work

A child of mass m = 16 kg slides down a slide of height h = 2.7 m without friction. Let gravitational potential energy be zero at ground level. a)Write an expression for the child's total mechanical energy, E, at the top of the slide, in terms of the variables in the problem and the acceleration due to gravity g.  b)Calculate the change in the child's potential energy, ΔU in joules, from the top to the bottom of the slide at ground level (i.e. ΔU = Uground - Utop).  c)What is the child's final speed, vf in m/s?

Help

Conservation of energy, means the sum of the kinetic and potential energies doesn't equal to the original kinetic energy. True O False

John is moving the drawer from one place to another, instead of pushing he used a rope to pull it instead. A 10kg drawer from rest pulled with a force of 330N by a rope inclined at 35 degrees. The drawer moves through a rough floor, a distance of 13m. If an average friction force of 25 N opposes the motion, what is the speed of the drawer box at the end of its displacement?