Energy stored in a stretched spring is U. It is cut in two equal parts. If one part is now stretched to
the same extension, energy stored in this part is
(1) U
(2) 2U
(3)U/2
(4) 4U

Which object is most likely represented by a dot?

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

In the circuit shown below, with each bulb holding a resistance of 60 ohms, how many amps of current are flowing? express your number as a decimal.