Find the power required to give a brick 150 JJ of potential energy in a time of 2.4 ss . Express your answer to two significant figures and include the appropriate units

The two ropes seen in the figure are used to lower a 255 kg piano exactly 6 m from a second-story window to the ground. How much work is done by w (with an arrow to the right)?Express your answer in joules. How much work is done by T1 (with an arrow to the right)?Express your answer in joules.

An object of mass 3.00 kg is subject to a force E, that varies with the position as in the figure below. (a) Find the work done by the force on the object as it moves from x = 0 to x = 5.00 m. (b) Find the work done by the force on the object as it moves from x = 5.00 m to x = 12.0 m. (c) Find the work done by the force on the object as it moves from x = 12.0 m to x = 17.0 m. (d) If the object has a speed of 0.400 m/s at x 0, find its speed at x = 5.00 m and its speed at x = 17.0 m. F, (N) 4 3 2 x (m) 4 8 10 12 14 16 18 20

A pail and its contents weigh 80 lbs. The pail is attached to the end of a 100 ft rope that weighs 10 lb and is hanging vertically. How much work is done in winding up the rope with the pail attached? For this problem, set up the appropriate integral(s), and evaluate the integral(s). The integral(s) can be evaluated by a calculator.