If several resistors are connected in series in
an electric circuit, the potential difference across
each resistor
(1) varies directly with its resistance
(2) varies inversely with its resistance
(3) varies inversely with the square of its
resistance
(4) is independent of its resistance

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 .