How can a machine make work easier for you?
a)by decreasing the amount of work you do on an object
b)by changing the direction of your applied force
c)by increasing the work done by the machine
d)none of the above

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 .