State the following statements as true or false.
a. The work done by a force on a body is equal to the dot product of the force and displacement of the body.
b. Instantaneously, work is not defined.
c. When several forces act on a body, the total work is the same as the work done by their resultant.

Explanation

a. False: The work done by a force is equal to the dot product of force and displacement of its point of application.
b. True: Work is defined for an interval of time.
c. True: `W_(n et)=sumF_i*s=(sumF_i)*s=F_(n et)*s`