5. Ученик берет у ребенка очки и читает книгу на расстоянии 16 см от глаза. Какова была оптическая сила очков, которые он носил?​ 5. The student takes the glasses from the child and reads the book at a distance of 16 cm from the eye. What was the optical power of the glasses he wore?

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 .