Assuming 100%efficient energy conversio, how much water stored behind a 50 centimeter high hydroelectric dam would be required to charge the battery

Why does the input force have to be greater than the force needed to lift the bale?

Aparticle of mass m is projected with an initial velocity v0 in a direction making an angle α with the horizontal level ground as shown in the figure. the motion of the particle occurs under a uniform gravitational field g pointing downward. (a) write down the lagrangian of the system by using the cartesian coordinates (x, y). (b) is there any cyclic coordinate(s). if so, interpret it (them) physically. (c) find the euler-lagrange equations. find at least one constant of motion. (d) solve the differential equation in part (c) and obtain x and y coordinates of the projectile as a function of time. (e) construct the hamiltonian of the system, h, and write down the hamilton’s equations (canonical equations) of motion.

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest