ASTR EXAM |ACTUAL EXAM COMPLETE ALL 70 QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) | GRADED A+ | LATEST 2024/2025
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ASTR
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ASTR
ASTR EXAM |ACTUAL EXAM COMPLETE ALL 70
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) | GRADED A+ | LATEST
2024/2025
Newton's second law of motion tells us that the net force applied to an object equals its
A) mass times energy.
B) momentum times velocity.
C) mass tim...
ASTR EXAM |ACTUAL EXAM COMPLETE ALL 70
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) | GRADED A+ | LATEST
2024/2025
Newton's second law of motion tells us that the net force applied to an object equals its
A) mass times energy.
B) momentum times velocity.
C) mass times velocity.
D) energy times acceleration.
E) mass times acceleration. - ANSWER-Answer: E
How does the Space Shuttle take off?
A) Its rocket engines push against the launch pad propelling the shuttle upwards.
B) It converts mass-energy to kinetic energy.
C) It achieves 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. -
ANSWER-Answer: D
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. - ANSWER-Answer: B
The fact that the Voyager spacecraft continue to speed out of the solar system, even
though its rockets have no fuel, 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) none of the above. - ANSWER-Answer: A
Changing the orbit of a spacecraft by firing thrusters 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) none of the above. - ANSWER-Answer: C
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 - ANSWER-Answer: B
A skater can spin faster by pulling her arms closer to her body or spin slower by
spreading her arms out from her body. This is due to
A) the law of gravity.
B) Newton's third law.
C) conservation of momentum.
D) conservation of angular momentum.
E) conservation of energy. - ANSWER-Answer: D
Which of the following is not a conserved quantity?
A) energy
B) momentum
C) angular momentum
D) radiation - ANSWER-Answer: D
Which of the following is not a unit of energy?
A) Calorie
B) joule
C) calorie
D) kilowatt
E) British thermal unit - ANSWER-Answer: D
Radiative energy is
A) heat energy.
B) energy from nuclear power plants.
C) energy carried by light.
D) energy used to power home radiators.
E) energy of motion. - ANSWER-Answer: C
When a rock is held above the ground, we say it has some potential energy. When we
let it go, it falls and we say the potential energy is converted to kinetic energy. Finally,
the rock hits the ground. What has happened to the energy?
A) The energy goes into the ground and, as a result, the orbit of the earth about the Sun
is slightly changed.
B) The energy goes to producing sound and to heating the ground, rock, and
surrounding air.
C) The rock keeps the energy inside it (saving it for later use).
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