PHA EXAM 1 QUESTIONS & ANSWERS 2024/2025
hypothesis - ANSWERSAn idea that is based on evidence but requires further testing
observation - ANSWERSTest of an idea by taking data from an environment in nature
experiment - ANSWERSTest of an idea by taking data in a controlled setting such as...
hypothesis - ANSWERSAn idea that is based on evidence but requires further testing
observation - ANSWERSTest of an idea by taking data from an environment in nature
experiment - ANSWERSTest of an idea by taking data in a controlled setting such as a laboratory
opinion - ANSWERSA belief that may or may not be backed by evidence
Perform a carefully controlled observation or experiment - ANSWERSSuppose a friend tells you that hot
water freezes faster than cold water but you are skeptical of this claim. According to the Scientific
Process, what is the best way to determine whether the claim is true?
b & e - ANSWERSIf I am standing on a table and the table is holding me steady, which of the following
statements are true? Choose all that apply
a) The normal force on me is stronger than the gravitational force on me.
b) There is no net force on me.
c) There are no forces on me at all.
d) The gravitational force on me is stronger than the normal force on me.
e) The normal force is equally strong as my weight.
The Sun and Jupiter exert equal forces on one another but in opposite directions - ANSWERSThe Sun is
more massive than the Jupiter. Which of the following is true about their gravitational interaction
false - ANSWERSA 5,000,000 kg asteroid flying through space at 10 m/s has more momentum than an
asteroid with the same mass flying twice the speed
, The astronaut is both in orbit and in freefall - ANSWERSSuppose an astronaut is floating in the
International Space Station, which is orbiting the Earth. Which of the following is true?
I would be falling through the ground - ANSWERSIf the ground pushed me upward with a normal force
that were weaker than the gravitational force applied by the Earth, what would be happening?
Because the sun has a larger mass, it accelerates less in response to the gravitational force between the
two bodies - ANSWERSWhich of the following statements explains why Earth orbits the Sun instead of
the Sun orbiting Earth?
slow down - ANSWERSSuppose a space ship is flying through space. It is subjected to a force of 100 N in
the backward direction. What will it do?
false - ANSWERSBecause Mars has a smaller acceleration due to gravity than Earth, I would have less
mass on Mars than on Earth
tennis ball - ANSWERSSuppose a moving car hits a flying tennis ball. Which object accelerates more?
true - ANSWERSBecause Mars has a smaller acceleration due to gravity than Earth, I would weigh less on
Mars than on Earth
neither - ANSWERSSuppose a moving car hits a flying tennis ball. Which object exerts a stronger force on
the other?
not at all - ANSWERSSuppose a space ship is flying through space. It is subjected to a force of 50 N
leftward and 50 N rightward at the same time. In what way will it accelerate?
c - ANSWERSWhich will accelerate more?
a) A 10,000 kg cart being pushed with 100 N of force
b) Neither
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