 #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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