Question

When you open a door.
a)what force do you exert on it?
b)Is any work done?Say why or why not .​

Answer 1

Answer:

ANSWER

ANSWEROpening a door requires our hand to apply force by pushing and pulling which is a contact force. There is some frictional force in the door hinge, against that we apply force. The hinge friction is again a contact force.