What method is used when you try several different solutions to see what works?
A. Trial and error
B. Stages
C. Heuristic
D. Rational

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 .

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.