You find a featureless black slab. there are two arms marked in and out. you find that moving the in arm 20 inches causes the out arm to move 5 inches. you find that a 10 lb. pull on in lifts 30 lbs. on out. what is the ama? a. 1
b. 4
c. 3
d. 1/3

c. 3

Explanation:

Given:

Since AMA i.e. actual mechanical advantage is defined as the ratio of the output force to the input force on a simple machine. This takes into account the losses occurred.

Now, mathematically:

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.