Question

A traffic policeman waves his arm in the air.

His shoulder is at point O. His arm moves from I to F forming an angle of
75°. Length of his arm is 60 cm.
Find the area he swept by his arm.

Answer 1

Answer:When two different materials are rubbed together, there is a transfer of electrons from one material to the other material. This causes one object to become positively charged (the electron loser) and the other object to become negatively charged (the electron gainer

Step-by-step explanation: