TEST 1 HANDOUT (REVIEW QUESTIONS) 1. The synthesis of a large collection of info
ID: 1359696 • Letter: T
Question
TEST 1 HANDOUT (REVIEW QUESTIONS)
1. The synthesis of a large collection of information that contains well-tested and verified hypothesis, laws and definitions to explain observed behavior of nature is a scientific
A. fact
B. prediction
C principle
D. theory
E. none of these
2. The scientific method is most effective in
A. making hypotheses
B. gaining, organizing, and applying new knowledge
C. making theories
D. performing experiments
3. In science an educated guess is a A. hypothesis B. theory C. law D. scientific fact
4. Which of the following is a scientific claim
A. The moon is made of green cheese.
B. There are things we will never know about.
C. Matter is filled with undetectable particles.
D. There are regions beneath the earth’s crust that will always be beyond the reach of scientific investigation.
5. A cruise ship covers a distance of 80 mi during a watch that lasts from midnight to 8:00 a.m. How fast was the ship going at 4:00 a.m. if the speed of the ship was constant at 10 mi/h during the watch?
A. 80 mi/h
B. 8O mi
C. l0 rni/h
D. There is not enough information to be able to say.
6. A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. This best demonstrates A. the milk carton has no acceleration B. there is action and reaction pair of forces C. gravity tends to hold the milk carton secure D. the milk carton has inertia
7. What is the net force on a cart that is pulled to the right with a force of 170 lb and to the left with a force of 90 lb A. 80 lb to the right B. 80 lb to the left C. 260 lb to the right D. 260 lb to the left
8. Strange as it may seem, it is just as hard to accelerate a car on the moon as it is to accelerate the same car on earth. This is because A. the mass of the car is independent of gravity B. the weight of the car is independent of gravity C. nonsense ! A car is much more easily accelerated on the moon than on the earth.
9. If you push on a crate with a force of 240 N and it moves at constant velocity, how much friction force is acting on the object A. 240 N, opposite direction B. 240 N, same direction C. 100 N, opposite direction D. 100 N, same direction
10. Which of the following statements are true for a car set in cruise-control A. Zero acceleration B; Dynamic Equilibrium C. Forces on the car are balanced D. All the above
11. A yellow car takes 20 minutes to go from milepost 130 to 170. A green car takes 10 minutes to go from milepost 330 to 350. Which car has the smaller average speed? A. yellow car C. Their average speeds are the same B. green car D. There is not enough information
12: Which of the following is a measure of speed A. l0 mi, North B. 10 mi/h C. 10 mi/h, North D. 10 mi/h/h, North
13. Which of the following is considered to be an accelerator? A. Brake pedal B. Gas pedal C. Steering wheel D. All of the above
14. If we use positive and negative signs to indicate the directions of velocity and acceleration, which of the following situations is the object SPEEDING UP? A. positive velocity and negative acceleration B. negative velocity and positive acceleration C. negative velocity and negative acceleration D. positive velocity and zero acceleration
15. A pitcher requires about 0.1 seconds to throw a baseball, if the ball leaves his hand at speed of 40 m/s, what is the ball’s acceleration? A. 40 m/s/s B. 400 rn/s/s C 40 m/s D 0 m/s/s
16. The instructor drove his car at a steady velocity of 70 mi/h for 2 hours, determine the acceleration of his motion. A. Zero B 35mifh/h C. 70 mi/h/h D. 72 mi/h/h
17. Zimba the lion has a mass of 2400 kg on earth. When he is taken to the moon where acceleration due to gravity is 1/6 that on earth, his mass becomes A. 400 kg B 2400 kg C. 24000 kg D. 7200 kg
18. Suppose that you look out the tenth-floor window and see a ball falling at 15m/s. How fast will the ball be falling 4s later in the absence of air resistance? A. 25m/s B. 35m/s C. 45m/s D. 55m/s
19. A ball is thrown straight up in the absence of air resistance. For which situation is both the instantaneous velocity and acceleration zero? A. on the way up B. At the top C. on the way back down’ D. none of these .
20. If the mass of an object in free-fall is tripled, its acceleration A. triples - B. quadruples C. stays the same D. reduces.to1/3
21. An object is thrown straight upward at an initial velocity of 20 m/s in the absence of air resistance. Compute its velocity 4s later? A. 10 m/s upward B. 20 m/s downward’ C. 60 m/s upward D. 60 m/s downward
22. Which of the following is not a vector quantity? A. force b. Acceleration C. Velocity D. Speed’
23. A bullet is dropped from the top of a building while another bullet is fired downward from the same location. Neglecting air resistance, acceleration after been released is greatest for the A. fired bullet B. dropped bullet. C. the same for each
24. Which property of motion is constant for an object in free-fall? A. acceleration B Velocity C. Speed
25. If it takes 20 seconds for a stone to free fall to the ground from the top of the San Antonio tower. How tall is the tower? A about 200m B about75Om C. less than l000m D. more than l000ms
26. The strength of gravity on Mars (planet) is only 60 % that of earth. If an individual has a mass of 50 kg on earth, what would the individual’s weight be on Mars? A. 300N’ B. 400N C. 120N D 30N
27. An astronaut on a strange planet has a mass of 80 kg and a weight of 240 N. Using the equation for weight, determine the acceleration due to gravity on this planet? A. 3 m/s/s B. 8 m/s/s C. l0 m/s/s D. 1/3m/s/s
28. The same net force is applied to two blocks, the yellow one has larger acceleration than the blue one. Which of the following statements is true? (Consider Newton’s second law) A. the yellow one has larger mass B. the blue one has larger mass C. both have the same mass D. the yellow block has a larger weight
29. What is the net force on a 2000 kg airplane flying at a constant velocity of 200 km/h using Newton’s second law of motion? A. Zero B. 400000N C. 10 N D. Not enough information
30. A car has a mass of 2000 kg and accelerates at 25 m/s/s . Compute the magnitude of the force on the car using Newton’s second law? A. 50,000 N B. 80N C. 2025N D 1975N 31. An apple weighs 13 N. The net force on the apple as it free-falls is A. 0 N B. 13N C 23N D 130N.
32. A sky-diver steps out from a helicopter and falls 5s before reaching her terminal velocity of 50 mi/h. Her acceleration just before reaching terminal velocity is A constant B. Zero C. g = acceleration due to gravity D. less than g
33. A sky-diver who weighs 1200 N, reaches terminal velocity at 100 mi/h. The force of the air-resistance on the sky-diver at terminal velocity is A l00 N B. 1200N C. 1300N D. Not enough information 34: Al Roker weighs 310 lb on earth. Joe weighs 310 lb on the moon. Which person has the smaller mass? A. Al Roker B. Joe C. they have the same mass 35. An object is propelled along a straight-line by an unbalanced force. If the net force on the object is doubled, its acceleration in accordance with Newton’s second law will A. double B. reduce to one-half C. stays the same
36. If the net force on a hot-air balloon is directed straight-upward, in which way does its acceleration point? A. downward B. upward C. in the direction of the force of gravity D. none of the above
37. Friction is independent on which of the following factors
A. Weight of object
B. Surface areas in contact
C. Nature of the surfaces in contact
38. Which of the following motions are not possible in nature?
A. motion with acceleration north and velocity south
B motion with acceleration north and velocity north
C motion at zero acceleration
D. constant velocity motion round a block
39. An apple in the absence of air resistance, falls from a tree and hits the ground 5 meters below. It hits the ground with a speed of about
A. 5 m/s
B. 10 m/s
C. l5 m/s
D. not enough information provided
40. If an object falls with constant acceleration, the velocity of the object must
A. be constant also
B. continually change by the same amount each second
C. continually change by varying amounts depending on its speed
D. continually decrease
Explanation / Answer
1.D
2.B
3.A
4.C
5.C
6.D
7.A
8.A
9.A
10.C
11.C
12.B
13.A
14.C
15.B
16.A
17.B
18.D
19.D
20.C
21.B
22.D
23.C
24.A
25.C
26.A
27.A
28.B
29.A
30.A
31.B
32.C
33.B
34.A
35.A
36.B
37.B
38.D
39.B
40.B
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