12 Questions
| Attempts: 359

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Questions and Answers

- 1.If an object's velocity is doubled, its momentum is
- A.
Halved

- B.
Unchanged

- C.
Doubled

- D.
Quadrupled.

- E.
Dependent on its acceleration.

- 2.Suppose an object is moving in a straight line at 50 mi/hr. According to Newton's first law of motion, the object will
- A.
Continue to move in the same way forever, no matter what happens.

- B.
Continue to move in the same way until it is acted upon by a force.

- C.
Eventually slow down and come to a stop.

- D.
Continue to move in a straight line forever if it is in space, but fall to the ground if it is on Earth.

- 3.How does the Space Shuttle take off?
- A.
Its rocket engines push against the launch pad, propelling the shuttle upwards.

- B.
By converting mass-energy to kinetic energy

- C.
By achieving lift from its wings in the same way that airplanes do

- D.
Hot gas shoots out from the rocket and, by conservation of momentum, the shuttle moves in the opposite direction.

- E.
The hot rocket exhaust expands the air beneath the shuttle, propelling it forward.

- 4.The movement of a pool ball, after being struck by a cue, is an example of
- A.
Newton's first law of motion.

- B.
Newton's second law of motion.

- C.
Newton's third law of motion.

- D.
The universal law of gravitation.

- E.
Conservation of momentum.

- 5.What quantities does angular momentum depend upon?
- A.
Mass and velocity

- B.
Mass, velocity, and radius

- C.
Force and radius

- D.
Force, velocity, and radius

- E.
Momentum and angular velocity

- 6.Considering Einstein's famous equation, E = mc2, which of the following statements is true?
- A.
Mass can be turned into energy, but energy cannot be turned back into mass.

- B.
It takes a large amount of mass to produce a small amount of energy.

- C.
A small amount of mass can be turned into a large amount of energy.

- D.
You can make mass into energy if you can accelerate the mass to the speed of light.

- E.
One kilogram of mass represents 1 joule of energy.

- 7.Which of the following statements correctly describes the law of conservation of energy?
- A.
An object always has the same amount of energy.

- B.
Energy can change between many different forms, such as potential, kinetic, and thermal, but it is ultimately destroyed.

- C.
The total quantity of energy in the universe never changes.

- D.
The fact that you can fuse hydrogen into helium to produce energy means that helium can be turned into hydrogen to produce energy.

- E.
It is not really possible for an object to gain or lose potential energy, because energy cannot be destroyed.

- 8.Where does the energy come from that your body uses to keep you alive?
- A.
It is produced from the radiative energy of the Sun on your skin.

- B.
It comes from the foods you eat.

- C.
It comes from the water you drink.

- D.
It is in the air that you breathe.

- E.
It is created during the time that you rest or sleep.

- 9.According to the universal law of gravitation, the force due to gravity is
- A.
Directly proportional to the square of the distance between objects.

- B.
Inversely proportional to the square of the distance between objects.

- C.
Directly proportional to the distance between objects.

- D.
Inversely proportional to the distance between objects.

- E.
Not dependent on the distance between objects.

- 10.According to the universal law of gravitation, if you double the masses of both attracting objects, then the gravitational force between them will
- A.
Not change at all.

- B.
Increase by a factor of 2.

- C.
Decrease by a factor of 2.

- D.
Increase by a factor of 4.

- E.
Decrease by a factor of 4.

- 11.The allowed shapes for orbits under the force of gravity are
- A.
Ellipses only.

- B.
Ellipses and spirals.

- C.
Ellipses, parabolas, and hyperbolas.

- D.
Ellipses, spirals, and parabolas.

- E.
Spirals, circles, and squares.

- 12.At which lunar phase(s) are tides least pronounced (e.g., the lowest high tides)?
- A.
First quarter

- B.
New moon

- C.
Full moon

- D.
Both new and full moons

- E.
Both first and third quarters

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