Gina wheels her wheelchair up a ramp using a force of 80 newtons . if the ramp has a mechanical advantage of 7 what is the output force in newtons

Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

Idon’t quite understand this problem