Your friend says that the heavyweight champion of the world cannot - TopicsExpress



          

Your friend says that the heavyweight champion of the world cannot exert a force of 50 N on a piece of tissue paper with his best punch. The tissue paper is held in midair, no wall, no tricks. You agree that it cant be done. You have reservations about this claim. You disagree, for a good punch easily delivers this much force. End of Question 1 Question 2 2 Open Hint for Question 2 in a new window When a bat hits a ball, the ball simultaneously may exert the same amount of force on the bat. exerts the same amount of force on the bat—definitely. exerts less force on the bat. exerts more force on the bat. End of Question 2 Question 3 3 Open Hint for Question 3 in a new window The force exerted on the tires of a car to directly accelerate it along the road is exerted by the grooves in the tire surface. friction on the tires themselves. interaction between the front and rear tires. motor of the car. pavement. End of Question 3 Question 4 4 Open Hint for Question 4 in a new window The team to win in a tug-of-war is the team that pulls harder on the rope to produce greater tension in it. pushes harder on the ground. Both of these. Neither of these. End of Question 4 Question 5 5 Open Hint for Question 5 in a new window A massive fast-moving car collides head on with a light slow-moving car. The force of impact is greater on the small car. heavy car. Actually, the force is the same on each. More information is needed to answer this correctly. End of Question 5 Question 6 6 Open Hint for Question 6 in a new window A massive fast-moving car collides head on with a light slow-moving car. The acceleration is greater on the small car. heavy car. Same for both. More information is needed to answer this correctly. End of Question 6 Question 7 7 Open Hint for Question 7 in a new window An airplanes speed across the ground can be affected by the wind. When an airplane encounters a crosswind (wind at 90° to the plane) the speed of the plane across the ground below is decreased. increased. unaffected. End of Question 7 Question 8 8 Open Hint for Question 8 in a new window Suppose that Nellie Newton hangs from two strands of rope that form equal angles to the vertical. Then the tension in each rope is more than her weight. is less than her weight. may be more, or may be less than her weight. answer : 1 2 5 23 12 3
Posted on: Mon, 21 Oct 2013 02:00:24 +0000

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