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.

measuring things 1 litre of water

answer(20) psi;