An object of mass 4.0 kg is dropped from a height of 1000 m from a helicopter. The air resistance acting
against the parachute exerts a steady upward force of 35 N. Calculate the kinetic energy of the object when it reaches the ground and hence find its velocity.

If you mix chlorine lithium and nickel together which two elements would be the most reactive

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.

You charge a parallel-plate capacitor, remove it from the battery, and prevent the wires connected to the plates from touching each other. when you increase the plate separation, what happens to the following quantities?