Alight meter reports that a camera setting of 1125s at f/4.0 will give a correct exposure. but the photographer wishes to use f/16 to increase the depth of field. what should the shutter speed be?

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 .