Physics

Question 1 (10 points) Calculate the force needed to stretch a spring with a spring constant k=5.00N/mm 1.54cm.Question 2 (10 points) A 500kg cart, starting from rest, is being accelerated at the rate of 2.25m/s/s. Calculate the net force acting on this cart that causes that acceleration.Question 3 (10 points) A piano is being pulled by one person with a force F1=30.8N and pushed by another person in the same direction with a force F2=43.2N. Calculate the net force exerted on the piano.Question 4 (20 points) Two extremely dense spheres have a center-to-center spacing of 1.00mm. Calculate the force of attraction between them if m1=60.0kg and m2=100kg.