Calculating Acceleration, Work, and Power for a Sled Pulled at an Angle

AI Thread Summary
A 12kg sled is pulled by a 15N force at a 35-degree angle on a frictionless surface, leading to calculations for acceleration, work, and power. The net force is determined to be 12.29N, resulting in an acceleration of 1.0 m/s². There is uncertainty regarding the initial velocity (v1) for calculating work done over 3 seconds, with some suggesting it may be zero. Clarification on assumptions regarding initial conditions is necessary for accurate calculations. The discussion emphasizes the importance of clearly stating assumptions in physics problems.
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Homework Statement


A 12kg sled is pulled by a 15N force at an angle of 35 degrees horizontally along a frictionless surface.

a) Calculate acceleration of the sled.
b) Calculate work done on the sled in 3.0 seconds.
c) Calculate the power generated in pulling the sled.


Homework Equations





The Attempt at a Solution



a) Fnet = ma

Let x be the net force.

15cos35 = x
x= 12.29N

12.29=12a
a=1.0m/s^2

b) If v1 is 0 in this case then I can solve it, my question is... is it 0?
 
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a) 12.29/12 is not 1

b) Is v1 = 0? Well, the problem statement as you presented it is pretty vague. You may have to make an assumption. If you do so, be sure to clearly state it as such.
 
The reason why I posted here because I was not sure if it was 0 and I thought somebody else would maybe have an answer..
 

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