- #1

Iwanttolearnphysics

- 44

- 9

- Homework Statement
- Question 1: A 100N force is applied to move a 15kg object a horizontal distance of 5 meters at constant speed.

Question 2: A 100N force is applied at an angle of 30degrees to the horizontal to move a 15kg object at a constant speed for a horizontal distance of 5m.

- Relevant Equations
- Fnet = ma

W = Fs

Here's where I got the questions:

- These are from a worksheet I downloaded online: Answer Key
- The answer key says that the answer to the first question is 500J and for the next question it's 433J.
- It says constant speed though, so I don't understand why the answers aren't zero. I get how they got 500J and 433J since it's just basic math, but this doesn't make any sense to me conceptually.
- How can work be done when acceleration is zero?
- What do I not understand? Please help me out.

- I get it now. Nevermind! It says on the key that it's the "work done by the applied force" not the net force.
- Still though, is my understanding correct, that if there's no acceleration, there's no net work?

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