A 900-g rock is whirled in a horizontal circle at the end of a 1.8-m-long string. If the breaking strength of the string is 110 N , what’s the minimum angle the string can make with the horizontal?

In raising a 6200-n piano with a pulley system, the movers note that, for every 2.2 m of rope pulled down, the piano rises 0.12 m . ideally, find the force required to lift the piano.

25pts the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

An object has a weight of 500 on earth what is the mass of this object