Question

14. All living beings need food. Living beings have to perform several basic activities to survive. The energy for these processes comes from food. All such activities require energy. In day-to-day life, we consider any useful physical or mental labour as work. Activities like playing in a field, talking with friends, humming a tune, watching a movie, attending a function are sometimes not considered to be work. Push a pebble lying on a surface. The pebble moves through a distance. You exerted a force on the pebble and the pebble got displaced. In this situation, work is done. Thus, work done by a force acting on an object is equal to the magnitude of the force multiplied by the distance moved in the direction of the force. (a) In case of negative work, what should be the angle between the force and displacement. (b)What will be the amount of Work done if force is perpendicular to the displacement?​

Answer 1

Answer:

a) the angle between the force and displacement in case of negative work is 180 degree

b)amount of work done will be zero when force is perpendicular to displacement