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WorksheetsBasic Physics Benchmark
Total questions: 25
Worksheet time: 2hrs 5mins
In the absence of air resistance, a ball of mass "m" is tossed upward to reach a height of 20m. At the 10-m position, half way up, the net force on the ball is
2mg
mg
mg/2
mg/4
When you drop a ball from rest it accelerates downward at 9.8 m/s^2. If you instead throw it downward, assuming no air resistance, its acceleration immediately after leaving your hand is
9.8m/s2
more than 9.8m/s2
less than 9.8m/s2
cannot say, unless the speed of throw is given
A heavy rock and a light rock in free fall (zero air resistance) have the same acceleration. The heavy rock doesn't have a greater acceleration because the
force due to gravity is the same on each.
air resistance is always zero in free fall.
inertia of both rocks is the same.
ratio of force to mass is the same.
None of these.
A karate chop delivers a force of 3000 N to a board that breaks. The force that the board exerts on the hand during this event is
less than 3000 N.
3000 N.
greater than 3000 N.
Need more information.
When an increase in speed doubles the momentum of a moving body, its momentum
increases, but less than doubles.
doubles.
more than doubles
depends on factors not stated.
When an increase in speed doubles the kinetic energy of a moving body, its momentum...
Increases, but less than doubles.
Doubles.
More than doubles.
Depends on factors not stated in the question.
A large mass and a small mass can balance on a seesaw because of balanced _______________.
forces
torques
energies
all of these.
Which of the following steps is NOT a part of the scientific method?
Recognize a problem.
Perform experiments to test the predictions.
Match the conclusion to the prediction, regardless of the data that was collected.
Formulate a general rule or emergent truth based on the results of the experiments.
A ball is thrown straight up. Which number is the acceleration of the ball closest to at the top of its path?
0 m/s2
5 m/s2
10 m/s2
20 m/s2
While taking a selife, you drop your phone off of a tall cliff. What is the speed of the phone one second after you drop it?
10 m/s
0 m/s
20 m/s
This cannot be answered without knowing the mass of the phone.
The fact that the Moon always shows its same face to Earth is evidence that the Moon rotates about its axis roughly once per __________.
day
month
year
None of these, the moon does not rotate about its axis.
Earth satellites, such as the International Space Station, orbit at altitudes that are mainly above Earth's _______________.
atmosphere.
gravitational field.
both of these.
The mass of an atom comes mostly from its:
and its volume comes from its:
nucleons; nucleons
electrons; electrons
electrons; nucleons
nucleons; electrons
The electrical force of attraction between an electron and a proton is greater on ...?
proton
electron
neither, both are the same
All of the following are electromagnetic waves EXCEPT
radio waves
micro waves
light waves
X-rays
None is outside the family; all are electromagnetic waves
Compared with the sound you hear from the siren of a stationary fire engine, the sound you hear when it approaches you has an increased
speed
frequency
wavelegnth
All of these
The phenomenon of interference occurs for
sound waves
light waves
both of these
neither of these
When you look at the red petals of a rose, the color light you're seeing is
the light absorbed by the rose.
the light reflected off of the rose.
all the colors of the rainbow.
none of these.
Astrophysicists are able to identify the elements in the outer layers of a star by studying its
doppler effect
molecular structure
temperature
spectrum
If the Sun collapsed to become a black hole, Planet Earth would
continue in its present orbit
fly off in a tangent path
likely be sucked into the black hole
be pulled apart by tidal forces
both C and D
Any atom that emits an alpha particle or beta particle
becomes an atom of a different element, always
may become an atom of a different element
becomes a different isotope of the same element
increases its mass
Suppose the number of neutrons in a reactor that is starting up doubles each minute, reaching one billion neutrons in 10 minutes. When did the number of neutrons reach half a billion?
1 minute
2 minutes
5 minutes
9 minutes
none of these
The equation E=mc2 indicates that energy
equals mass moving at the speed of light squared
equals moving mass
is fundamentally different than mass
and mass are closely related
Which color of light has the longest wavelength?
Red
Green
Violet
Ultraviolet
Electromagnetic waves always travel faster than sound waves.
True
False
