It’s a snowy day and you’re pulling a friend along a level road on a sled. you’ve both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you’ve been walking at a steady 1.5 m/s, and the rope pulls up on the sled at a 30 ° angle. you estimate that the mass of the sled, with your friend on it, is 60 kg and that you’re pulling with a force of 75 n. what answer will you give?

Explanation:

In order to solve this problem we must first start by drawing a diagram of the situation. (See attached picture).

So we can start solving this problem by doing a sum of the forces in the y-direction so we get:

which yields:

which can be solved for N so we get:

we know that:

and that

W=mg

so we can substitute that into our original equation so we get:

we can also substitute the provided data here so we get:

which yields:

N=551.1N

Next we can do a sum of forces in the x-direction so we get:

which gives us:

We know that the friction is given by the following formula:

and that:

so we can substitute them into our sum of forces so we get:

we can now solve this for :

which yields:

now we can substitute the provided data so we get:

So the coefficient of kinetic friction between the sled and the snow is 0.12.

c.the charges if the proton and electron and gravity

scientific laws are the result of testing theories and proving them to be facts.