The spiral spring of a spring balance is 25cm long when 5N hangs on it and 30cm long when the weight is 10N what is the length of the spring if the weight is 3N.

Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j

You throw a baseball directly upward at time =0 at an initial speed of 14.9 m/s. what is the maximum height the ball reaches above where it leaves your hand? ignore air resistance and take =9.80 m/s2.

Calculate a pendulums frequency of oscillation (in hz) if the pendulum completes one cycle in 0.5s.