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1) A kilogram is a measure of an object's
- A) gravity.
- B) mass.
- C) force.
- D) weight.
- E) center of mass.
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2) Compared with the mass of a certain object on Earth, the mass of the same object on the Moon is
- A) more.
- B) the same.
- C) less.
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3) Which has zero acceleration? An object
- A) moving at constant velocity.
- B) at rest.
- C) in mechanical equilibrium.
- D) all of these
- E) none of these
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4) Hang from a pair of gym rings and the upward support forces of the rings will always
- A) add up to equal your weight.
- B) each be half your weight.
- C) each be equal to your weight.
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5) The two measurements necessary for calculating average speed are
- A) distance and acceleration.
- B) acceleration and time.
- C) distance and time.
- D) velocity and time.
- E) velocity and distance.
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6)If a freely falling object were somehow equipped with an odometer to measure the distance it travels, then the amount of distance it travels each succeeding second would be
- A) less and less.
- B) greater than the second before.
- C) constant.
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7) An object maintains its state of motion because it has
- A) weight.
- B) mass.
- C) acceleration.
- D) speed.
- E) all of these
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8) A force is a vector quantity because it has both
- A) mass and acceleration.
- B) magnitude and direction.
- C) action and reaction counterparts.
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9) The force required to maintain an object at a constant velocity in free space is equal to
- A) the mass of the object.
- B) the force required to stop it.
- C) the weight of the object.
- D) zero.
- E) none of these
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10) A player hits a ball with a bat. The action force is the impact of the bat against the ball. The reaction to this force is the
- A) force of the ball against the bat.
- B) air resistance on the ball.
- C) grip of the player's hand against the ball.
- D) weight of the ball.
- E) none of these
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11) Which of the following has the largest momentum relative to the earth?
- A) a tightrope walker crossing Niagara Falls
- B) a dog running down the street
- C) the Science building on campus
- D) a Mack truck parked in a parking lot
- E) a pickup truck speeding along a highway
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12) If you push an object just as far while applying twice the force, you do
- A) the same amount of work.
- B) four times as much work.
- C) twice as much work.
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13) What does an object have when moving that it doesn't have when at rest?
- A) energy
- B) momentum
- C) mass
- D) inertia
- E) none of these
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14) Newton discovered
- A) gravity.
- B) that gravity is universal.
- C) neither
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15)For the astronauts inside the orbiting space shuttle, there is no force of Earth's gravity acting on them. This statement is
- A) sometimes true while in orbit.
- B) always false.
- C) always true while in orbit.
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16)A rock is thrown upward at 50e with respect to the horizontal. As it rises, its vertical component of velocity
- A) decreases.
- B) remains unchanged.
- C) increases.
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17) earth satellites are typically more than 100 km high so as to be above the earth's
- A) atmosphere.
- B) gravitational field.
- C) both of these
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18) Water pressure is greatest against the
- A) bottom of a submerged object.
- B) sides of a submerged object.
- C) is the same against all surfaces.
- D) top of a submerged object.
- E) none of these
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19) When you touch a cold piece of ice with your finger, energy flows
- A) from your finger to the ice.
- B) from the ice to your finger.
- C) actually both ways
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20) The lowest temperature possible in nature is
- A) 4 K.
- B) 0eC.
- C) -273eC.
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21) A substance can absorb heat energy by the process of
- A) radiation.
- B) convection.
- C) conduction.
- D) all of these
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Do problems 22-26 or the essay questions:
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22) What is the average speed of a cheetah that sprints 280 meters in 6 seconds?
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23) What is the acceleration of a vehicle that changes its velocity from 200 km/hr to a dead stop in 2 seconds?
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24) Calculate the applied force on an object of mass m=5 kg from rest to produce an acceleration of 10 m/s.
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25) What is the momentum of a truck with mass m = 1000kg, moving at 80 m/s?
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26). Calculate the work done on the Earth by a colliding comet of mass m=10,000kg traveling at a speed of v=200,000m/s.
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27) State the impulse-momentum relationship and give an example.
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28) State Newton�s laws of motion and give examples.
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29) Distinguish between velocity and acceleration.
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