Imagine a atwood's machine with a "massive" string without weights attached. the experiments here used a light string, whose mass (compared to that of the weights) you ignored. suppose that you moved the string so that unequal lengths were on each side of the pulley. what type of motion will you see when the string is released?

Determine the critical height h of the water level that causes the concrete gravity dam to be on the verge of tipping over due to water pressure. the density of concrete is ρc = 2.40 mg/m3. suppose that hd = 38 m. hint: work the problem using a 1-m width of the dam.

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.