Question

Help please!!! I am in a bit of a time crunch!
(Question below)

Answer 1

A force acting on an object does no work if.......

A.) a machine is used to move the object.
B.) the force is not in the direction of the object's motion.
C.) the force is greater than the force of friction.
D.) the object accelerates.

Answer 2

@Farcher

Answer 3

any suggestions?

Answer 4

i think it's D but I have no clue

Answer 5

work done = F x distance moved in direction of force

Only one of the above answers satisfies that relationship..

Answer 6

force does no work if force is perpendicular to the direction of motion, or if the displacement caused by that force acting only is zero

Answer 7

Doesn't work if its going against the direction of the motion
For a object to move, the force has to be greater than the maximum static force, if its going directly against it, the forces are in equilibrium, therefore, it wouldn't move

Answer 8

so D is not the right answer because if object accelerates it moves a certain distance

Answer 9

okay would it be B?

Answer 10

no, because it isn't said that this direction is perpendicular

Answer 11

C?

Answer 12

Hopefully the diagram will help you