Quiz Chapter 15

apparent motion 1 Suppose you walk across a room carrying a bucket of water in your righteousness hand. To keep the water from sloshing out, you walk at ageless step on it, making real the bucket is kept at the same height above the cast anchor. Which didactics is true? a) You exert a squash on the bucket and do fashion on the bucket as you carry it. b) You exert a force on the bucket but do no work on the bucket. c) You dont exert a force on the bucket and you do no work on it. Answers b distrust 2 unfeigned or FALSE If an object moves from one establish in space to an some other, then work has been done on the object. a) square b) FALSE Answers bQuestion 3 Suppose you push on a heavy(a) table and the table doesnt move. The work that you do is a) positive. b) zero. c) negative. Answers b Question 4 A hockey puck slides across the ice and in the end comes to a stop. Which statement is true? a) The work done by solemness is zero. b) The work done by graveness is equa l to the gravitational force ages the distance the puck slides. c) The work done by gravity footnot be calculated. Answers A Question 5 You lift a throw bag straight upwards off the floor. Which statement is correct? a) You do the same work whether you lift the book bag right a substance or slowly. ) You exert the same power whether you lift the book bag quickly or slowly. c) The work you do is zero, making the power also zero. Answers A Question 6 Any object that has kinetic thrust moldiness be a) moving. b) falling. c) high above the fuse. d) at rest. Answers A Question 7 A book is at rest on a tabletop. iodine schoolchild calculates the likely sinew as 15 J. Another student calculates the electric potential energy as 20 J. Which statement is correct? a) matchless or both of the students must have calculated the potential energy incorrectly. b) two answers could be correct. c) Both answers are amiss(p) because they use the wrong units.Read also Quiz Week 4Answers b Question 8 TRUE or FALSE An object that moves express has greater potential energy. a) TRUE b) FALSE Answers b Question 9 A orchis is thrown straight up into the air (with no air resistance). Where is the ens potential energy the greatest? a) When it is first released b) Half way up c) At its highest point Answers c Question 10 A softball player pull aheads a pop up (where the ball is hit high above the infield). As the ball rises, we know that a) the kinetic energy increases as the potential energy decreases. b) the kinetic energy decreases as the potential energy increases. ) the kinetic energy and potential energy both increase. d) the kinetic energy and potential energy both decrease. Answers b Question 11 TRUE or FALSE A small rainfly can have a bigger nervous impulse than a large truck. a) TRUE b) FALSE Answers a Question 12 You and a friend foundation on ice skates facing each other in the affectionateness of a frozen pond. If you throw a basketball to your friend (wh o happens to bid less than you do), what happens? a) You and your friend both move away from each other at the same run. b) Your friend moves away from you at a faster speed than you have. ) Your friend moves away from you at a slower speed than you have. d) You dont move but your friend moves away at a very fast speed. Answers b Question 13 A tetherball is made by attaching one end of a rope to a ball and the other to a pole. After you hit the ball, the rope wraps some the pole as the ball circles it with a shorter radius each time it goes around. Which of the following statements is correct about the ball after it is hit? a) Both the angular momentum and the speed of the ball increase. b) Both the angular momentum and the speed of the ball decrease. ) The angular momentum of the ball sash constant while the speed of the ball increases. d) The angular momentum of the ball sash constant while the speed of the ball decreases. Answers c Question 14 As a tornado becomes more narro w, the rotational speed a) decreases. b) increases. c) stays the same. Answers b Question 15 You see a rocket fly by with a speed that you measure to be close to the speed of light. a) The someone standing on the ground sees the rocket looking flat along the counselling of motion, while the individual in the rocket sees the person on the ground looking stretched. b) The person standing on the ground sees the rocket looking compressed along the direction of motion, and the person in the rocket sees the person on the ground also looking compressed. c) The person standing on the ground sees the rocket looking stretched along the direction of motion, while the person in the rocket sees the person on the ground looking compressed. d) The person standing on the ground sees the rocket looking stretched along the direction of motion, and the person in the rocket sees the person on the ground also looking stretched. Answers b