Asled starts at rest with 51,450 j of potential energy. after traveling part of the way down the slope, the sled has 32,781 j of potential energy. if there is no friction, what is the kinetic energy of the sled?

Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n

True or false graphs must include scales that increase by the same amount

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?