Is work done if you carry a book across the room at a constant velocity? a. no, the force applied is parallel to the direction of motion. b. yes, the force applied is parallel to the direction of motion. c. no, the force applied is perpendicular to the direction of motion. d. yes, the force applied is perpendicular to the direction of motion.

No, the force applied is perpendicular to the direction of motion.

Explanation:

Work done is given by :

F = force

d = displacement

= angle between force and displacement

Work is positive when the force and the displacement are in same direction. Work is negative when the force and the displacement are in opposite direction. When the force and displacement are perpendicular to each other, no work is done.

If we carry a book across the room at a constant velocity, the work done is zero. This is because our weight is acting vertically downward and we are moving forward. The angle between the force and the displacement is 90. So, no work is done.

Hence, the correct option is (c) "No, the force applied is perpendicular to the direction of motion".

answer

procedural programming, object-oriented programming

explanation

procedural programming is a type of computer programming language that specifies a series of well structured steps and procedures   within its development period of time. it contains a systematic order of statements, functions and commands to complete a computational task or program. it is centered on creating procedures. while object oriented programming is a programming language that is centered on creating objects rather that actions and data rather than logic.. it has four principles which are inheritance, polymorphism, abstraction and encapsulation