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Newton’S Laws Practice

Practice problems about Newton's Laws

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Newton’S Laws Practice

  1. 1. Newton’s Laws Practice
  2. 2. 1 <ul><li>The kilogram is a measure of an object’s: </li></ul><ul><li>A) weight </li></ul><ul><li>B) gravity </li></ul><ul><li>C) force </li></ul><ul><li>D) mass </li></ul>
  3. 3. 2 <ul><li>Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency is of the rock is to: </li></ul><ul><li>A) continue to follow a circular path </li></ul><ul><li>B) follow a straight line path </li></ul>
  4. 4. 3 <ul><li>A sheet of paper can be withdrawn from under a milk carton without toppling it as long as the sheet is pulled quickly. This demonstrates: </li></ul><ul><li>A) gravity tends to hold the carton to the ground </li></ul><ul><li>B) the carton has inertia </li></ul><ul><li>C) for every action there’s an equal reaction </li></ul>
  5. 5. 4 <ul><li>Your weight is: </li></ul><ul><li>A) a property of mechanical equilibrium </li></ul><ul><li>B) actually your mass </li></ul><ul><li>C) the gravitational attraction between your body and the earth </li></ul>
  6. 6. 5 <ul><li>One object has twice as much mass as another object, and also has twice as much: </li></ul><ul><li>A) volume </li></ul><ul><li>B) velocity </li></ul><ul><li>C) inertia </li></ul><ul><li>D) gravitational acceleration </li></ul>
  7. 7. 6 <ul><li>Jupiter has 3 times the gravitational force of Earth. So on Jupiter, a 100kg object would have a mass of: </li></ul><ul><li>A) 100kg </li></ul><ul><li>B) 30kg </li></ul><ul><li>C) 300kg </li></ul><ul><li>D) 600kg </li></ul>
  8. 8. 7 <ul><li>An object weighs 20lbs on the Earth, another object weighs 20lbs on the moon. Which object has more mass? </li></ul><ul><li>A) Object on the Earth </li></ul><ul><li>B) Object on the Moon </li></ul><ul><li>C) Not enough information to say </li></ul>
  9. 9. 8 <ul><li>The law of inertia applies to: </li></ul><ul><li>A) objects at rest </li></ul><ul><li>B) objects in motion </li></ul><ul><li>C) both moving and nonmoving objects </li></ul>
  10. 10. 9 <ul><li>A force is a vector quantity because it has both: </li></ul><ul><li>A) mass and acceleration </li></ul><ul><li>B) action and reaction counterparts </li></ul><ul><li>C) magnitude and direction </li></ul>
  11. 11. 10 <ul><li>10kg brick and a 1kg brick are dropped in a vacuum, the force of gravity on the 10kg brick is: </li></ul><ul><li>A) zero </li></ul><ul><li>B) 10 times as much as the 1kg brick </li></ul><ul><li>C) the same as the 1kg brick </li></ul>
  12. 12. 11 <ul><li>An object is propelled along a straight-line path. If it’s force were doubled, then it’s acceleration would: </li></ul><ul><li>A) halve </li></ul><ul><li>B) quadruple </li></ul><ul><li>C) double </li></ul><ul><li>D) stay the same </li></ul>
  13. 13. 12 <ul><li>An object is propelled in a straight-line path by a force. If the mass of the object is somehow doubles, it’s acceleration: </li></ul><ul><li>A) halves </li></ul><ul><li>B) quadruples </li></ul><ul><li>C) doubles </li></ul><ul><li>D) stays the same </li></ul>
  14. 14. 13 <ul><li>An object is pulled northward at 20N and southward at 15N. What magnitude of the net force? </li></ul><ul><li>75N </li></ul><ul><li>10n </li></ul><ul><li>0N </li></ul><ul><li>15N </li></ul>
  15. 15. 14 <ul><li>A 10N falling object encounters 10N of air resistance. The magnitude of the net force is: </li></ul><ul><li>A) 100N </li></ul><ul><li>B) 10N </li></ul><ul><li>C) 0N </li></ul><ul><li>D) Infinite </li></ul>
  16. 16. 15 <ul><li>An apple is held at rest above your head. The magnitude of the net force of the apple is: </li></ul><ul><li>A) 10N </li></ul><ul><li>B) 0N </li></ul><ul><li>C) 100N </li></ul><ul><li>D) between 10N and 0N </li></ul>
  17. 17. 16 <ul><li>Which has zero acceleration? An object_____ </li></ul><ul><li>A) at rest </li></ul><ul><li>B) changing its direction </li></ul><ul><li>C) changing its speed </li></ul><ul><li>D) all of these </li></ul>
  18. 18. 17 <ul><li>Whenever the net force on an object is zero, the acceleration </li></ul><ul><li>A) may be zero </li></ul><ul><li>B) is zero </li></ul>
  19. 19. 18 <ul><li>A car has a mass of 3000kg and accelerates at 2 m/s/s. What is the magnitude of the force exerted on the car? </li></ul><ul><li>1500N </li></ul><ul><li>3000N </li></ul><ul><li>6000N </li></ul><ul><li>2000N </li></ul>
  20. 20. 19 <ul><li>A tow truck exerts a 2 m/s/s acceleration on a car with a force of 300N. The mass of the car is </li></ul><ul><li>A) 600N </li></ul><ul><li>B) 3000kg </li></ul><ul><li>C) 150kg </li></ul><ul><li>D) 1500kg </li></ul>
  21. 21. 20 <ul><li>A girl pulls a 10kg wagon with a constant force of 300N. What is the wagon’s acceleration in m/s/s? </li></ul><ul><li>A) .3 </li></ul><ul><li>B) 3000 </li></ul><ul><li>C) 30 </li></ul><ul><li>D) 1/30 </li></ul>
  22. 22. 21 <ul><li>Whenever an object exerts a force on another object, the second object exerts a force of the same magnitude but in the opposite direction. </li></ul><ul><li>A) Always true </li></ul><ul><li>B) Sometimes true </li></ul><ul><li>C) Usually true </li></ul>
  23. 23. 22 <ul><li>A high school student hits a nail with a hammer. During the collision there is a force: </li></ul><ul><li>A) On the hammer but not the nail </li></ul><ul><li>B) On the nail but not the hammer </li></ul><ul><li>C) On both hammer and nail </li></ul>
  24. 24. 23 <ul><li>Forces always occur: </li></ul><ul><li>A) in singles </li></ul><ul><li>B) in pairs </li></ul><ul><li>C) in triplets </li></ul><ul><li>D) in space </li></ul>
  25. 25. 24 <ul><li>A rocket is able to propel itself in in the vacuum of space by firing its engines. The force that propels the rocket is: </li></ul><ul><li>A) The exhaust gasses pushing on space </li></ul><ul><li>B) The exhaust gasses heating up the ship </li></ul><ul><li>C) The exhaust gasses rushing away from the ship </li></ul>
  26. 26. 25 <ul><li>An archer shoots an arrow. Consider the action force to be the bowstring pushing against the arrow. The reaction force is: </li></ul><ul><li>A) air resistance pushing against the arrow </li></ul><ul><li>B) the grip of the archers hand on the bow </li></ul><ul><li>C) the push of the arrow against the bowstring </li></ul><ul><li>D) none of these </li></ul>
  27. 27. 26 <ul><li>A baseball player bats a ball with a force of 1000N, the ball exerts a reaction force against the bat of </li></ul><ul><li>A) 100N </li></ul><ul><li>B) 1000N </li></ul><ul><li>C) A little less than 1000N </li></ul><ul><li>D) Not enough information </li></ul>
  28. 28. 27 <ul><li>As the ball falls, the action force is the mass of the earth pulling on the ball. The reaction force is </li></ul><ul><li>A) the ball’s pull on the earth </li></ul><ul><li>B) nonexistent in this case </li></ul><ul><li>C) the pull of the opposing fans’ minds </li></ul><ul><li>D) air resistence </li></ul>
  29. 29. 28 <ul><li>A karate chop delivers a blow of 3,000N to a board that breaks. The force that acts on the hand is actually: </li></ul><ul><li>A) more than 3000N </li></ul><ul><li>B) less than 3000N </li></ul><ul><li>C) exactly 3000N </li></ul><ul><li>D) depends if the board was oak or ash </li></ul>
  30. 30. 29 <ul><li>Arnold Strongman and Suzy Small pull hard in opposite directions in a tug of war. The greatest force on the rope is exerted by: </li></ul><ul><li>A) Suzy, suprisingly </li></ul><ul><li>B) Arnold, of course </li></ul><ul><li>C) both the same </li></ul>
  31. 31. 30 <ul><li>Are you getting tired of questions about Newton’s Laws? </li></ul><ul><li>A) No way, I love Physics! </li></ul><ul><li>B) No, I can do this all day </li></ul><ul><li>C) Please give me more questions!!! </li></ul>

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