Tara goes kayaking at sunrise. She rows 50 feet in 20 seconds. She transfers 100 joules of energy. What is Tara's power?
5 W 10 W
50 W
2 W

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 .