A 1000kg car is traveling around a circular roundabout at a constant speed of 10 m/s. The radius of the circular roundabout is 20 meters. What is the net force acting on the car? O N because the car is traveling at a constant speed 5000 N towards the center of the circle C . 5000 N in the same direction as the velocity of the car d. 500 N towards the center of the circle 5. A ball is attached to a string as it swings in a vertical circle at a constant speed. Where is the tension in the string the greatest? At the top of the circular path. At the bottom of the circular path. The tension in the sting is constant. 6. A 250g block slides up and back down a rough inclined plane. The work done by friction as the clock slides up the ramp is , and the work done by friction as it slides back down the ramp is a. Positive, positive Positive, negative C. Negative, positive Negative, negative 7. 250g block is sliding across a frictionless horizontal surface at 2m/s when it encounters a long rough patch. The force of friction over the rough patch is 0.5N. How far would the block slide over the rough patch before it comes to rest? . 0.5m (b. 1m C. 1.5m 2m 9. A meter stick is initially balanced on a fulcrum when I place 3kg of mass 10cm to the left of the fulcrum and 2kg of mass 15cm to the right of the fulcrum. Which direction will the meter stick start to rotate? a. Clockwise Counterclockwise It will not rotate d. Not enough information 10. A mechanic is trying to loosen a rusty bolt by applying a 500N force to a wrench 5cm from the edge of the wrench. The force makes a 75-degree angle with the wrench but the bolt won't budge. Which of the following will NOT increase their chance of loosening the bolt? (a) Changing the direction of the force so that it makes a 60-degree angle with the wrench. Increasing the magnitude of the force applied. Applying the same force at the edge of the wrench (further from the bolt)