Study the image
A girl holds an apple with two equal opposing forces: an upward force of hand on apple, and downward force of Earth on apple.
Which of these correctly explains whether this image is an example of Newton’s third law, and why?
Girl holding an apple. Labels added by FlipSwitch.
Girl: Medina, Lorelyn/Shutterstock; Apple: veronchick84/Shutterstock
Responses
This is not an example of Newton’s third law because although the forces are equal in strength the forces are in the same direction.
This is not an example of Newton’s third law because although they are acting in opposite directions, the forces are unequal in strength.
This is an example of Newton’s third law because they are equal in strength, opposite in direction, and acting on one object.
This is not an example of Newton’s third law because although the forces are equal in strength and opposite in direction, they are acting on one object.
9 answers
Responses
A box with opposing forces. A longer force vector (floor on box) points up, and a shorter force vector (box on floor) points down.
© 2016 FlipSwitch
A box with equal and opposing forces. A force vector (floor on box) points up, and an equal force vector (box on floor) points down.
© 2016 FlipSwitch
A box with one force: a force vector (floor on box) pointing up.
© 2016 FlipSwitch
A box with equal and opposing forces. A force vector (floor on box) points up, and an equal gravitational force vector (Earth on box) points down.
© 2016 FlipSwitch
A box with equal and opposing forces. A force vector (floor on box) points up, and an equal force vector (box on floor) points down.
Responses
0.5 N, upward
10 N, forward
10 N, backward
0 N, forward
Responses
A box with two forces. A buoyant force vector (water on box) points up. A shorter gravitational force vector (Earth on box) points down.
Labels and arrows added by FlipSwitch.
davooda/Shutterstock
A box with two forces. A buoyant force vector (water on box) points up. A longer gravitational force vector (Earth on box) points down.
Labels and arrows added by FlipSwitch.
davooda/Shutterstock
A box with one force. A buoyant force vector (water on box) points up.
Labels and arrows added by FlipSwitch.
davooda/Shutterstock
A box with two forces. A buoyant force vector (water on box) points up. An equal gravitational force vector (Earth on box) points down.
Labels and arrows added by FlipSwitch.
davooda/Shutterstock
A box with two forces. A buoyant force vector (water on box) points up. A shorter gravitational force vector (Earth on box) points down.
A box with two forces. A buoyant force vector (water on box) points up. A longer gravitational force vector (Earth on box) points down.