Question 3 (8 points) Your go-cart breaks down right before the end of a race, so you have to push it over the finish line. The go-cart has a mass of 85 kg. a. What is the weight of your go-cart? (2 points) b. How much force must you apply to give the go-cart an acceleration of 0.9 m/s2? (2 points) c. If you push with a force of 350 N, what is the acceleration of the cart? (2 points) d. Later, you are driving your friend's go-cart. If his cart has an acceleration of 5.5 m/s2 and the cart's engine is applying a forward force of 720 N, what is the mass of his go-cart? (2 points) Question 4 (2 points) You have a ball with mass 2.8 kg tied to a rope, and you spin it in a circle of radius 1.3 m. If the ball is moving at a speed of 7 m/s, what is the centripetal force acting on the ball? (2 points)