Jana investigates the movement of a lift by placing an apple with a mass of 100 g on a Newton scale. During the first 3 seconds of movenent the scale registers a reading of 1,2 N. Over the next 5 seconds it registers 0,98 N and for the last 2 seconds the reading is 0,7 N. Draw a force diagram of all the forces acting on the apple.

Question

Jana investigates the movement of a lift by placing an apple with a mass of 100 g on a Newton scale. During the first 3 seconds of movenent the scale registers a reading of 1,2 N. Over the next 5 seconds it registers 0,98 N and for the last 2 seconds the reading is 0,7 N. Draw a force diagram of all the forces acting on the apple.

Answer 1

We cannot provide diagrams for you.

The apple's weight is M g = 0.98 N. That is the steady "down" force. The scale exerts an "up" force on the apple that is initially 1.20 N, then 0.98 N, and finally 0.70 N.

The probably want yo to plot both forces vs. time for 0 < t < 10 s.

The elevator is first accelerating up, then maintaining constant velocity, and finally, decelerating for the last 2 seconds.