Answers to Physics Concept Questions - Test #1
  1. Art, religion and science do not necessarily contradict one another because
    1. all three have different and mutually exclusive domains
    2. the only rational course is to choose science and reject religion and art
    3. the only rational course is to choose science and art and reject religion
    4. if you choose science, you should reject religion and art
    5. if you choose religion you should reject science
    6. the three can legitimately work to complement and enrich one another
    7. if you choose art you should reject science
    8. if you choose art you should reject religion
  2. A frame-work that is used to synthesize a collection of hypotheses and related information is called a
    1. hypothesis
    2. fact
    3. theory
    4. law
    5. principle
    6. science
    7. all of the above
    8. none of the above
  3. Being knowledgeable about science, the arts, and religion, makes a person
    1. very confused
    2. truly educated
    3. very arrogant
    4. very intelligent
    5. all of the above
    6. none of the above
  4. A scientific hypothesis is
    1. a theory
    2. a hypothesis
    3. a frame-work
    4. a law
    5. a principle
    6. an educated guess
    7. a fact
  5. The difference between science and technology is that technology deals more with
    1. space aliens
    2. development of scientific theories to address human needs
    3. establishment of scientific institutions to address human needs
    4. discovery of scientific laws to address human needs
    5. application of scientific principles to address human needs
    6. destruction of opposing scientific theories
    7. leprechauns
  6. An object falls out of an airplane, and falls freely downward. Its
    1. mass increases
    2. acceleration increases
    3. velocity increases
    4. gravity increases
    5. mass decreases
    6. velocity decreases
    7. acceleration decreases
  7. You brake suddenly. The passengers in your car lurch forward. This demonstrates
    1. gravity
    2. mass
    3. weight
    4. length
    5. good driving
    6. inertia
    7. that a leprechaun was crossing the road
  8. A truck is travelling at 10 m/s. A package drops off the truck. Neglecting air resistance, as the package hits the ground, its horizontal speed is
    1. 0 m/s
    2. 10 m/s
    3. 20 m/s
    4. depends on the height of the truck
    5. depends on the weight of the package
    6. depends on the color of the package
    7. 100 m/s
  9. A truck is decelerating. A package is dropped from the midpoint of the ceiling of the truck's storage compartment. The package hits the floor
    1. immediately beneath the midpoint of the ceiling
    2. closer to the back of the truck than the midpoint
    3. closer to the front of the truck than the midpoint
    4. all of the above
    5. none of the above
  10. You tie a rock to a string and whirl it in a horizontal circle. The string breaks. In the absence of gravity, the rock
    1. travels in a circle
    2. falls in a straight line down to the earth
    3. flies in a straight line vertically up into the air
    4. travels in a straight line horizontally away from you
    5. falls in a parabola to the earth
    6. immediately stops moving
    7. explodes
  11. A freely falling object started from rest. 2 seconds later, its speed is about
    1. 5 m/s
    2. 10 m/s
    3. 15 m/s
    4. 20 m/s
    5. 25 m/s
    6. 30 m/s
    7. 35 m/s
  12. A base ball is hit straight up into the air at a speed of 20 m/s. How long does it take to reach the high-point in its trajectory.
    1. 1/2 seconds
    2. 1 second
    3. 2 seconds
    4. 4 seconds
    5. 5 seconds
    6. 10 seconds
    7. 20 seconds
  13. Galileo used inclined planes to ____ the effective acceleration (of a rolling cylinder or ball) compared to earth's gravity
    1. increase
    2. stop
    3. decrease
    4. keep the same
    5. none of the above
    6. all of the above
  14. A baseball is hit vertically upward at 30 m/s. One second later its speed is about ____ vertically upward.
    1. 30 m/s
    2. 35 m/s
    3. 40 m/s
    4. 25 m/s
    5. 20 m/s
    6. 15 m/s
    7. 10 m/s
    8. 0 m/s
  15. A ball is thrown upwards and caught once it comes back down. The speed of the ball as it returns and is caught is ___ if there is air resistance compared to if there were no air resistance.
    1. greater
    2. the same
    3. double
    4. zero
    5. infinite
    6. lower
    7. none of the above
  16. The force of gravity acting on a 100 kg person is ___ compared to the force of gravity on a 1 kg book
    1. 4 times larger
    2. the same
    3. double
    4. zero
    5. 10 times larger
    6. 100 times larger
    7. lower
    8. none of the above
  17. There is only one force acting on an object. For the object to travel at constant velocity, this force must be
    1. a constant non-zero value
    2. a varying non-zero value
    3. a constant zero value
    4. a positive value
    5. a negative value
    6. none of the above
  18. An object's mass is increasing while its acceleration is constant. The force applied to the object must
    1. be increasing
    2. be decreasing
    3. stay the same
    4. increase and then decrease
    5. decrease and then increase
    6. none of the above
  19. An object is moving in a circle with constant speed. The object has
    1. a constant velocity
    2. zero acceleration
    3. a constant acceleration
    4. zero velocity
    5. no forces acting on it
    6. no net force acting on
    7. changing velocity but constant acceleration
    8. changing velocity and acceleration
  20. A man weighs 900 N, and is standing with his feet across three bathroom scales so his weight is equally shared among the three scales. The reading on each scale is
    1. 900 N
    2. 2700 N
    3. 300 N
    4. 90 N
    5. 30 N
    6. none of the above
  21. A pebble flies up and hits the windshield of a truck travelling at 80 km/hr. The force of the impact is
    1. greater on the pebble
    2. lesser on the pebble
    3. greater on the pebble than on the windshield, if the pebble shatters
    4. greater on the windshield than on the pebble, if the windshield shatters
    5. the same on pebble and on the windshield
    6. none of the above
  22. As a meteor falls towards earth, it is attracted by earth's gravity. What is the reaction to this force?
    1. air resistance
    2. the meteor's inertia
    3. the earth's inertia
    4. the earth's gravity
    5. earth is attracted by the meteor's gravity
    6. the meteor is attracted by all the particles in the universe
    7. earth is attracted by all the particles in the universe
  23. A person who has a mass of 100 kg is attracted to the earth by a force of about 1000 N. The force with which this person attracts the earth is
    1. zero
    2. much smaller
    3. 10 N
    4. 100 N
    5. 500 N
    6. 1000 N
    7. 2000 N
    8. none of the above
  24. Two people are in a tug-of-war. Each person pulls the rope with a force of 500 N. What is the tension in the rope?
    1. 1000 N
    2. zero
    3. 250 N
    4. 500 N
    5. depends on the diameter of the rope
    6. none of the above
  25. Every force has an equal and opposite reaction. A force and its reaction
    1. cancel each other
    2. are two interactions
    3. are parts of a single interaction
    4. have double the effect compared to a force without its reaction
    5. none of the above
  26. A 7-year old child and a 21-year old college student pull as hard as they can on opposite ends of a rope in a tug-of war. The force is applied to the rope by the child is ___ compared to the force applied by the college student.
    1. smaller
    2. the same
    3. larger
    4. depends on how strong the child is
    5. none of the above
  27. A railroad car that is initially at rest is hit by an identical railroad car traveling with a momentum of 100 units. The cars stick together and move down the railroad tracks. The combined momentum of the cars after the collision is
    1. 200 units
    2. 100 units
    3. 50 units
    4. 0 units
    5. none of the above
  28. An athlete performs a high jump. As she lands, she bends her knees as she reaches the ground. This increases the time of impact. The result is to ___ the force that her body experiences.
    1. increase
    2. keep the same
    3. reduce
    4. the answer depends on how high she jumped
    5. none of the above
  29. A canon ball travelling at 10 m/s has a momentum of 50 kg m/s. What is the mass of the ball?
    1. 10 kg
    2. 50 kg
    3. 20 kg
    4. 5 kg
    5. 25 kg
    6. none of the above
  30. A car travelling at 10 km/hr runs into a haystack and comes to a stop. This is less dangerous than if the car had driven into a concrete wall. This is because driving into the haystack results in
    1. reduced impulse
    2. increased impulse
    3. the same impulse
    4. reduced change in momentum
    5. increased change in momentum
    6. the same change in momentum
    7. increased time of impact and reduced impact force
    8. increased time of impact and increased impact force
    9. reduced time of impact and reduced impact force
    10. reduced time of impact and increased impact force

PHYSICS WORLD .ORG
Test-1 | Home | Contact