You walk a distance of 1000 meters (one kilometer) along a level road while carrying a baby in a back-pack. The baby weighs 100 newtons (about 22 pounds), so you must exert a constant upward force of 100 newtons in order to carry it. How much work does this upward force do on the baby?
(A) 0. (B) 1000Nm. (C) 100Nm. (D) 100,000Nm.
Questions
--- 
What this question is about
You walk a distance of 1000 meters (one kilometer) along a level road while carrying a baby in a back-pack. The baby weighs 100 newtons (about 22 pounds), so you must exert a constant upward force of 100 newtons in order to carry it. How much work does this upward force do on the baby?
(A) 0. --- Yes.
Even though it feels like a lot of work.
The physics definition of "work" is really strange.
Questions
--- What this question is about
You walk a distance of 1000 meters (one kilometer) along a level road while carrying a baby in a back-pack. The baby weighs 100 newtons (about 22 pounds), so you must exert a constant upward force of 100 newtons in order to carry it. How much work does this upward force do on the baby?
(B) 1000Nm. --- No.
Multiply by the force component in
the direction of motion (which is zero).
Questions
--- What this question is about
You walk a distance of 1000 meters (one kilometer) along a level road while carrying a baby in a back-pack. The baby weighs 100 newtons (about 22 pounds), so you must exert a constant upward force of 100 newtons in order to carry it. How much work does this upward force do on the baby?
(C) 100Nm. --- No.
The force component in the direction of motion is zero.
Questions
--- What this question is about
You walk a distance of 1000 meters (one kilometer) along a level road while carrying a baby in a back-pack. The baby weighs 100 newtons (about 22 pounds), so you must exert a constant upward force of 100 newtons in order to carry it. How much work does this upward force do on the baby?
(D) 100,000Nm. --- No.
The force component in the direction of motion is zero.
Questions
--- What this question is about