For two variables in a direct proportion, what is the result of doubling one variable?

What determines the amount of inertia an object has

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?

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 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .