Question

4. Factors Affecting Frictions
eclined plane, take two halves of the chart paper S a
in laver). Gently release the ball on the indeed plane
es and note the distance moved by the ball Ro be po
per
deb che sand spread on chart paper and then on a plain.
other (a thin layer). Gently rele
pebbles and note the die​

Answer 1

please the concept is unclear and it clearly once again