1.  What is the net force exerted on a 90.0 kg race-car driver while the race car is accelerating from 0 to 44.7 m/s in 4.50 s?

2.  A 0.50 kg ball with a speed of 4.0 m/s strikes a stationary 1.0 kg target. If momentum is conserved, what is the total momentum of the ball and target after the collision?

3.  Starting from rest at the center of a skating rink, two skaters push off from each other over a time period of 1.2 s. What is the force of the push by the smaller skater?

4.  A ball moving at 30 m/s has a momentum of 15 kg·m/s. The mass of the ball is

5.  The 500 g cart is moving in a straight line at a constant speed of 2 m/s. Which of the following must the 250 g toy car have in order to maintain the same momentum as the cart?

6.  What is the mass of an object that has 200 J of kinetic energy when moving 2 m/s?

7.  Skylar climbed a ladder so that he had a potential energy of 2942 J. If his mass is 91.82 kg, about how high up is he on the ladder?

8.  A cheetah can run briefly with a speed of 31 m/s. Suppose a cheetah with a mass of 27 kg runs at this speed. What is the cheetah’s kinetic energy?

9.  Hot coffee is stirred with a spoon, the spoon gets hot due to

10.  What is the gravitational potential energy of a 500 g box 2 m above the ground?

11.  The SI unit for energy is

12.  29. What is the resistance in a wire that carries 5 amps when the voltage is 20 volts?

13.  The SI unit of power is

14.  The property of an object or a system which enables it to do work is


Use this diagram for questions 6-11

6.  Where does the ball have no speed?

7.  Where does the ball have the least kinetic energy?

8.  Where does the ball have the least potential energy?

9.  Where does the ball have the most kinetic energy?

10.  Where does the ball have the most potential energy?

11.  Where is the ball moving the fastest?

12.  What is the velocity of an object if it has a mass of 20 kg and a kinetic energy of 3,000 J

13.  The diagram shows two wave pulses travelling along a rope. When the wave pulses meet they will

14.  The velocity of sound is 340 m/s. What is the wavelength of a sound wave with a frequency 200 Hz is

15.  One should always wear sunscreen when out in the hot Texas sun. Sunburns are caused by

16.  It is possible to break a wine glass by singing very loudly at the right note.
This phenomenon is called

17.  The SI unit for resistance is

18.  Sound is a ______type of wave:

Use this diagram for questions 25-28

25. The wavelength is indicated by which letter?

26. The wave crest is represented by which letter?

27. The wave trough is represented by which letter?

28. Which letter represents amplitude?

31. In a swimming pool, the water near the surface is slightly warmer. The warm water rises because of

32. How much current flows through a wire with a resistance of 200 Ω if the voltage is 120 V?

33. In which circuit will the brightness of bulbs be diminished as more bulbs are added?

35. A student lifts a box of books that weighs 200 N. The box is lifted 0.65 m. How much work does the student do on the box?

Use this diagram for questions 36-37

36. The above circuit is a(n) ___ circuit.

37. If resistor one has a resistance of 12 Ω, resistor two has a resistance of 20 Ω, and resistor three has a resistance of 10 Ω, what is the total resistance?

38. In which circuit will the brightness of bulbs be diminished as more bulbs are added?

39. How much current does a 100-W light bulb use when connected to a voltage of 120 V?

47. In order for work to be done

48. A rock climber wears an 8.5 kg knapsack while scaling a cliff. After 25 minutes, the climber is 8.2 m above the starting point. If the climber has a weight of 650 N, how much work does she do lifting herself and the knapsack?

44. A principle stating that the total linear momentum of an isolated system remains constant regardless of changes within the system is known as

45. A forklift raises a box 3 m doing 15,000 J of work on it. What is the mass of the box?

46. A box that weighs 575 N is lifted a distance of 25 m straight up by a cable attached to a motor. The job is done in 12 s. What power is developed by the motor?

40. If the metal rod is held in the fire long enough, heat will travel down the rod and burn the hand. This type of heat transfer is

41. A house burns down. On the house across the street, all of the vinyl siding is twisted and warped by the heat. The heat was transferred across the street by

42. The above diagram represents

43. The straw in the glass of water above appears to be cut in half due to light rays being

51. A charge of -0.0002 C and a charge of 0.0008 C are separated by 0.25 m. What is the force between the two charges?

52. You observe two balloons being pushed away from each other as shown above. The repulsion of these balloons from one another provides evidence that ______.

53. Charges may be transferred from one object to another but cannot be created or destroyed. This is

54. Given the mass of an object, one should use the following equation to calculate the weight: