1. A rectangular container measuring 20cm x 30cm x 50cm is filled with water. Wh
ID: 1877600 • Letter: 1
Question
1. A rectangular container measuring 20cm x 30cm x 50cm is filled with water. What is the mass of this volume of water in kilograms? A. 30 kg B. 30,000 kg C. 30 milligrams D. 30,000 lbs
2. What is the volume of water in Question 2, in liters? A. 30 L B. 30,000 L C. 30 cm3
3. Which of the following is not a fundamental quantity? A. time B. weight C. mass D. length E. electric charge
4. The expression "1in. = 2.54cm" is properly called: A. an equation B. a conversion factor C. a rule of thumb D. an equivalence statement
5. What is necessary to designate a position? A. a reference point B. a direction C. fundamental units D. motion E. all of these
6. If substance A is less dense than substance B, then A has less per unit volume than B. A. weight B. mass C. space D. energy
7. If one motor has three times as much power as another, then the smaller power motor: A. can do the same work in the same time. B. can do the same work in three times the time. C. can never do the same work as the larger motor. D. can do the same work in one-third the time.
8. Which of the following is always true about the magnitude of a displacement? A. It is less than the distance traveled. B. It is equal to the distance traveled. C. It is less than or equal to the distance traveled. D. It is greater than the distance traveled. E. It is greater than or equal to the distance traveled.
9. During constant linear acceleration, what changes uniformly? A. acceleration B. distanceC. displacement D. velocity E. all of these
10. What is the state of an object being acted upon by an unbalanced force? A. at rest B. zero speed C. in motion with a constant velocity D. accelerated E. any of these
11. In addition to force, what does work involve? A. friction B. potential energy C. weight D. time E. motion
12. Which of the following has the greatest kinetic energy? A. a mass of 4m at velocity v. B. a mass of 3m at velocity 2v. C. a mass of 2m at velocity 3v. D. a mass of m with a velocity of 4v.
13. On which of the following does the speed of an object in free fall depend? A. potential energy B. 1/2mv2 C. D. parallel distance E. mass
14. A change in which of the following affects the weight of an object? A. momentum B. acceleration due to gravity C. unbalanced force D. v E. EP
15. Which is true concerning the acceleration due to gravity? A. It decreases with increasing altitude. B. It is different for different objects in free fall. C. It is a fundamental quantity. D. It is a universal constant. E. all of these
16. For every action force, there is: A. a net force. B. an unbalanced force. C. a friction force. D. an equal and opposite force. E. all of these
17. The direction of a natural process is indicated by which of the following? A. conservation of energy. B. change in entropy C. thermal efficiency D. specific heat E. expansion coefficient
18. What is the possible state of an object in the absence of a net force? A. at rest B. zero speed C. zero acceleration D. in uniform linear motion E. any of these
19. Which of the following has the greatest momentum? A. a mass of m with a velocity of 4v. B. a mass of 3m at velocity 3v. C. a mass of 2m at velocity 3v. D. a mass of 4m at velocity 2v.
20. A change in linear momentum requires which of the following? A. a change in velocity. B. an unbalanced force. C. an acceleration. D. any of these E. only A and C
21. If the speed of an object in uniform circular motion is tripled, the magnitude of the centripetal acceleration increases by a factor of: A. 2 B. 3 C. 9 D. 6 E. 8
22. A 1500kg space probe is moving at constant velocity of 4200m/sec. In a course change maneuver the rocket engines fire for 5 minutes increasing the probe's velocity to 5000m/sec. What is the probe's change in kinetic energy? A. 3.68x106 J. B. 5.52x109 J C. 1.1x1010 J D. not enough info.
23. What is the acceleration of the space probe in #22 during the firing sequence? A. 16.7 m/s2 B. 14 m/s2 C. 2.7 m/s2 D. not enough info.
MATCHING – FILL IN THE BLANKS
A. time B. watt C. mvr D. energy E. pressure AB. acceleration AC. vector AD. power AE. potential energy
24. The SI unit of power is
. 25. A horizontally thrown object and one dropped from the same height fall with the same constant
26. Energy possessed by an object due to its position .
27. Speed is a quantity.
28. Force per unit area.
29. The time rate of doing work is .
30. Angular momentum.
31. The standard unit of is the same in both metric and British systems.
32. The ability to do work.
33. Which of the following quantities determines the velocity of an object in free fall?
A. Ep B. 2C. 1/2mv2 D. Ek E. mass
34. Which is true concerning the acceleration due to Earth's gravity (ge) ?
A. It decreases with increasing altitude. B. It is different for different objects in free fall. C. It is a fundamental quantity. D. It increases with increasing altitude. E. all of these
35. On Earth, mg is: A. an acceleration. B. a force. C. weight D. mass E. both B and C
Explanation / Answer
1) A -30 Kg since 1000 cm3= 1 litre which is equal to 1 kg and 20cm x 30cm x 50cm=30000 cm3 =30 ltrs= 30 kg
2 ) A- 30 Litres
3) B- weight
4) B- a conversion factor
5) A. a reference point
6) B- mass
7) D- can do the same work in one-third the time
8) C- It is less than or equal to the distance traveled.
9) D- velocity
10) D. accelerated
11) E- motion
12) C. a mass of 2m at velocity 3v.
14) B. acceleration due to gravity
15) A-It decreases with increasing altitude
16) D- an equal and opposite force.
17) B. change in entropy
18) C. zero acceleration
19) B. a mass of 3m at velocity 3v. (which is 9mv)
20) D. any of these as a change in linear momentum requires a change in velocity, acceleration, and an unbalanced force any one could be the change in linear momentum.
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