All my points, since i am sadly going to be quitting for a bit

If a simple machine reduces the strength of a force, what must be increased?

On mars a rock falls an unknown vertical distance from a resting position and lands in a crater. if it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? mars' surface gravity is 3.8 m/s2.

Each line (unit) on the horizontal axis represents: 5 years 10 years 20 years all of the above