Work physics problem: A sled with a mass of 5.70kg is pulled..
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Work physics problem: A sled with a mass of 5.70kg is pulled..

[From: ] [author: ] [Date: 12-10-13] [Hit: ]
1. How much work is done on the sled when the force acting on it is F= (2.91N)x + (0.141N)y?2. If the mass of the sled increased,......
I'm not sure how to work with the components :(

A sled with a mass of 5.70kg is pulled along the ground through a displacement given by d= (2.90m)x (let the x axis be horizontal and the y axis be vertical).

1. How much work is done on the sled when the force acting on it is F= (2.91N)x + (0.141N)y?

2. If the mass of the sled increased, does the work done by the forces increase, decrease or stay the same? Explain

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1. Only the horizontal x-component of force can do work in the x direction.
The y-component is therefore ignored in this case.

So WD = F * d = 2.91N * 2.90m = 8.44 J

2. If there is friction between the sled and the ground, the WD by the pulling force increases.
The WD stays the same only if there is no friction and the ground is perfectly level.
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