An automobile accelerates from rest at
1.9 m/s2 for 30 s. the speed is then held
constant for 23 s, after which there is an ac-
celeration of -3.3 m/s' until the automobile
stops.
what total distance was traveled?
answer in units of km.

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 .