Question

1) Activity:
Take an empty match box. Take out its tray. Cut a used refill of a ball pen of the same
width as the tray as shown in the figure below. Fix the refill with two pins on the top
of the tray as shown. Make two holes on the opposite sides of the tray. Make sure
that the holes are large enough to allow a thread to pass through them easily. Take a
thread about a metre long and pass it through the holes as shown. Fix beads at the
two ends of the thread so that it does not come out. Insert the tray in the outer cover
of the matchbox. Suspend the match box by the thread. Leave the thread loose. The
match box will start falling down due to gravity. Tighten the thread now and observe
what happens.
Explain your observation. Can you relate it to friction?​

Answer 1

Answer:

when we tighten thread the matchbox get stay in one place

Answer 2

Answer:

the box will stop at the place this happens due to friction between them.