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  1. Bell Ringers with EQT Questions Second Semester Physical Science WithAnswers

  2. Bell Ringer 1-7 • A train travels 100 kilometers in 4 hours. Calculate its’ average speed. • A. 10 km/h • B. 20 km/h • C. 25 km/h • D. 50 km/h

  3. Bell Ringer 2-7 • If the distance an object has traveled in a certain amount of time is known, what can be calculated? • A. velocity • B. acceleration • C. force • D. speed

  4. Bell Ringer 3-7 • A car travels 300 kilometers in 3 hours. What can be determined? • A. velocity • B. speed • C. average speed • D. acceleration

  5. Bell Ringer 4-7 • A 300 N force acts on a 25 kg object. Calculate the acceleration of the object. • A. 100 m/s2 • B. 60 m/s2 • C. 30 m/s2 • D. 12 m/s2

  6. Bell Ringer 5-7 • A 3000N force acts on a 200 Kg object. Calculate the acceleration of the object. • A. 20 m/s2 • B. 15 m/s2 • C. 30 m/s2 • D. 12 m/s2

  7. Bellringer 6-7 • A student riding her bicycle on a straight, flat road covers one block every 7 seconds. Make a statement about her motion. • A. her velocity is increasing • B. her acceleration is increasing • C. Her speed and velocity are constant • D. her speed and velocity are increasing

  8. Bellringer 7-7 • Two forces act on an object. One force has a magnitude of 10 N and is directed toward the North. The other has a magnitude of 5 N directed toward the south. What is the net force experienced by the object? • A. 5 N south • B. 15 N south • C. 15 N north • D. 5 N North

  9. Bellringer 8-7 • A bird flies 150 m for 10 s , then 200 m for 10 s and then 100 m for 5 sec. What is the birds’ average speed? • A. 45 m/s • B. 18 m/s • C. 25 m/s • D. 200 m/s

  10. Bellringer 9-7 • John is in Chicago, IL. He decides to head south to Austin TX. In one hour he travels 80 km. What is his average velocity? • A. 1.2 km/hr • B. 80 km/hr • C. 40 km/hr • D. 80 km/hr south

  11. Bellringer 10-7 • Maria is on a bus traveling 15 m/s east and she decides to move from the front of the bus to the back. She begins walking to the rear of the bus at a rate of 1 m/s. What is her resultant velocity? • A. 16 m/s • B. 15 m/s • C. 14 m/s east • D. 0 m/s

  12. Bellringer 11-7 • A friend is helping Yen to rearrange her bedroom furniture. Yen exerts 25 N of force to push the foot-end of the bed while her friend exerts 20 N of force pulling the head-end of the bed. What net force is being used to move the bed? • A. 25N • B. 45 N forward • C. 5 N forward • D. 20 N forward

  13. Bellringer 12-7 • What is the resultant net force of a force of 7N north is combined with a force of 5N south? • A. 12 N • B. 12 N south • C. 12 N north • D. 2 N north

  14. Bellringer 13-7 • A man applies a force of 500 N to push a truck 10 m down the street. How much work has been done? • A. 500 J • B. 5000J • C. 50 J • D. 50000J

  15. Bellringer 14-7 • Carl rides his bike north for 100 m at a constant speed of 5 m/s. What is his acceleration? • A. 500 m/s • B. 20 m/s • C. 5000 m/s • D. there is no acceleration

  16. Bellringer 15-7 • A 20.0 N force is used to push a cart a distance of 5.0 meters. How much work is done on the cart? • A. 4 J • B. 100 J • C. 50 J • D. 10 J

  17. Bellringer 16-7 • Two children with the same mass face one another while standing on their skateboards. If they place their hands palm to palm and skateboarder #1 pushes as hard as he can, what will be the result? • A. Both will move toward the east • B. Both will move toward the west • C. Both will roll • D. Neither will move

  18. Bellringer 17-7 • Given four objects massing 4 kg, 2 kg, 6000g, and 1500 g. Which object will have more inertia than a 5 kg object? • A. 6000g • B. 100 g • C. 2 Kg • D. 2000g

  19. Bellringer 18-7 • A ball is dropped from a rooftop. What is the balls’ velocity after 3 seconds. Assume there is no air resistance. • A. 9.8 m/s • B. 29.4 m/s • C. 294 m/s • D. 3m/s

  20. Bellringer 19-7 • An apple falls from a tree. The gravitational force on the apple is 1N. If air resistance is 0.1N, what is the net force on the apple? • A. 1N • B. 1.1 N • C. 0.9 N • D. 0 N

  21. Bellringer 20-7 • How much power does a person weighing 500 N need to climb a 3 M ladder in 5 sec? • A. 1500 w • B. 500 w • C. 300 w • D. 30 w

  22. Bellringer 21-7 • Classify this device: a slanted surface used to raise an object. • A. screw • B. inclined plane • C. wedge • D. lever

  23. Bellringer 22-7 • Classify this device: an object that does work with only one movement and changes the size or direction of a force. • A. compound machine • B. lever • C. simple machine • D. pulley

  24. Bellringer 23-7 • Classify this device: a bar that is free to pivot about a fixed point. • A. screw • B. inclined plane • C. lever • D. pully

  25. Bellringer 24-7 • How should one classify an inclined plane wrapped around a cylindrical post? • A. screw • B. lever • C. inclined plane • D. pulley

  26. Bellringer 25-7 • Classify this device: two or more simple machines working together. • A. simple machine • B. compound machine • C. triple machine • D. poly machine

  27. Bellringer 26-7 • A man expends 100 J of work to move a box up an inclined plane. The amount of work produced is 70J. Calculate the efficiency of the inclined plane. • A. 100% • B. 70% • C. 50% • D. 25%

  28. Bellringer 27-7 • A boy pushes a lever 2 meters downward, and a box on the other end of the lever moves upward 2.5 meters. The boy uses 75 Newtons to raise the 50 Newton box. Calculate the efficiency of the lever. • A. 100% • B. 2.5% • C. 83.3% • D. 65%

  29. Bellringer 28-7 • Classify this device: an arrangement of pulleys designed to reduce the amount of effort force required. • A. wedge • B. block and tackle • C. harness • D. rings

  30. Bellringer 29-7 • A ramp is classified as what type of simple machine? • A. wedge • B. screw • C. inclined plane • D. pulley

  31. Bellringer 30-8 • What actions are most likely increase the kinetic energy of an object? • A. cut it in half • B. increase the mass and velocity • C. decrease the mass and velocity • D. all of the above

  32. Bellringer 31-8 • Joe is jumping on a trampoline. What is his energy level at the top of his jump? • A. maximum kinetic • B. maximum potential • C. minimum kinetic • D. minimum potential

  33. Bellringer 32-8 • Which of these vehicles has the most kinetic energy? A large truck traveling at 30 m/s , a small car traveling at 30 m/s, a minivan traveling at 45 m/s or a bicycle traveling 10 m/s? a. a minivan traveling at 45 m/s b. A large truck traveling at 30 m/s c. A small car traveling at 30 m/s d. A bicycle traveling at 10 m/s

  34. Bellringer 33-8 • Which of these vehicles has the LEAST kinetic energy? A large truck traveling 50 m/s, a small car traveling 30 m/s, a minivan traveling 45 m/s or a bicycle traveling 10 m/s? • A. a large truck traveling 50 m/s • B. a bicycle traveling 10 m/s • C. a minivan traveling 45 m/s • D. a small car traveling 30 m/s

  35. Bellringer 34-8 • What kind of energy would a stretched rubber band most closely model? • A. kinetic energy • B. potential energy • C. heat energy • D. nuclear energy

  36. Bellringer 35-8 • What happens in the amount and kind of energy when a pendulum swings in a downward direction? • A. potential goes to kinetic • B. kinetic becomes potential • C. no energy change • D. it stops

  37. Bellringer 36-8 • A cart traveling on a roller coaster has both potential and kinetic energy. Where will the cart have the greatest potential energy? • A. bottom of first hill • B. top of tallest hill • C. top of first hill • D. top of the last hill

  38. Bellringer 37-8 • The cart is traveling forward on a roller coaster. At what point will the cart have the greatest kinetic energy? • A. top of the tallest hill • B. bottom of the tallest hill • C. top of the middle hill • D. bottom of the last hill

  39. Bellringer 38-8 • Consider a man winding his pocket watch. Classify the energy he is storing in the watch spring. • A. potential energy • B. kinetic energy • C. elastic potential energy • D. elastic kinetic energy

  40. Bellringer 39-8 • Choose the best description of kinetic and potential energy. • A. Kinetic is energy of position and potential is movement • B. Kinetic is static and so is potential • C. Kinetic is energy of movement and potential is energy of position • D. none of these are descriptions of energy

  41. Bellringer 40-8 • If the speed of an object is changed, what effect will that have on the object’s potential energy? • A. It will increase • B. It will decrease • C. It will double • D. It will not be affected

  42. Bellringer 41-8 • A sample of water is at 1 degree C. Energy is removed from the sample. What type of change will occur with the water sample? • A. it will heat up • B. it will cool down • C. it will loose volume • D. it will not change

  43. Bellringer 42-8 • What happens to the particles of matter inside of a substance when that substance loses or absorbs energy? • A. the speed of the particles will not change • B. it shrinks • C. the speed of the particles always change • D. it gets hot

  44. Bellringer 43-8 • What type of process will a substance undergo if it absorbs energy? • A. exothermic • B. endothermic • C. it swells • D. is shrinks

  45. Bellringer 44-8 • A solid is at its melting point. The substance absorbs additional energy. What will happen to the substance? • A. the particles of the substance will increase motion in the solid • B. the particles of the substance will decrease motion in the solid • C. it will glow in the dark • D. Nothing will occur

  46. Bellringer 45-8 • Alex wants to change the state of matter in a sample he has on the lab table. What will Alex have to do to the sample to change its’ state? • A. cool it down • B. change its’ energy • C. heat it up • D. nothing will change the matters’ state

  47. Bellringer 46-8 • A liquid becomes a gas. What molecular changes must have occurred for this change to happen? • A. it heats up • B. it cools down. • C. it compresses • D. the molecules move further apart

  48. Bellringer 47-8 • To what is a high temperature in a substance most closely related? • A. high potential energy • B. high kinetic energy • C. low potential energy • D. low kinetic energy

  49. Bellringer 48-8 • Through which states of matter is convection of thermal energy most likely to occur? • A. liquids and gasses • B. liquids and solids • C. solids, liquids and gasses • D. only solids

  50. Bellringer 49-8 • If the coffee in a large cup is placed in the microwave oven for 2 minutes, what is most the likely cause for the increase in temperature of the coffee? • A. decrease in potential energy • B. increase in potential energy • C. increase in kinetic energy • D. decrease in kinetic energy