(144)^2/(2x32) is the height (in feet) of the cliff? (use 32 ft/s2 for the acceleration due to gravity.)
h = height (ft)
h = (1/2)gt2 = 16t2
v = final speed = gt = 88 ft/s ⇒ t = 88/g = 88/32 s = 2.75 s
h = 16t2 = 16(2.75)2 ft = 121 ft.
An example of gravity is the force that keeps gas under the sun. The force that causes a ball thrown into the air to fall again. The power to roll downhill without stepping on the accelerator. The force with which a dropped glass hits the ground.
In general relativity, gravity is not a force between masses. Instead, gravity is the effect of space and time distortion in the presence of mass. If no force acts on an object, it will move in a straight line.
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