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Duplicate of Physics Honors Semester 1 Final Review Flashcards | StudBud
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Duplicate of Physics Honors Semester 1 Final Review
Duplicate of Physics Honors Semester 1 Final Review
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Flashcards
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Questions
31
Answers
1
How did Einstein bridge between Newton's world and Einstein's world?
time dilation
F=ma
Sandquist
time travel
2
Universal Gravity: A 70 kg student and another 70 kg student standing 1 m apart.
3.25x10-7 N
3.5x10-7 N
3x10-7 N
3.27x10-7 N
3
Name one of Galileo's observations that led to his understanding of inertia.
if friction were absent, a moving object would move forever
marble in bowl goes the same height no matter the shape/size
an object wants to keep doing what it is doing
gravity
4
What is mass?
measure of inertia
the equivalence of weight
amount of material in an object
force caused by gravity
5
Which is true about black holes?
bends space and time
forms when a star collapses
pull of gravity so great nothing can escape, not even light
it sucks
6
What is free fall?
speed in a given direction
object's gravity equal to air resistance
push or pull
as objects fall, they accelerate toward the Earth
7
What is weight?
amount of material in an object
the equivalence of mass
force caused by gravity
measure of inertia
8
What is Newton's Second Law?
F=ma
law of inertia
for every action, there is an equal & opposite reaction
push or pull
9
A parachute opens and changes the speed of a car from 85 m/s to 45 m/s in 4.5 seconds. Solve.
8.9 m/s2
-9.9 m/s2
-8.9 m/s2
-7.9 m/s2
10
A 1500 kg truck drives at 12 m/s with a force of 2.25x10
4
N. It accelerates for 12 seconds.
192 m/s
184 m/s
177 m/s
190 m/s
11
If a truck has a mass of 1,000 kg, what is its momentum? (v = 35 m/s)
33,000 kg m/s
37,000 kg m/s
30,000 kg m/s
35,000 kg m/s
12
What is velocity?
speed in a given place
speed in a given time
uhhhh
speed in a given direction
13
Newton said gravity was a _______ caused by ___________.
push / curve of spacetime
pull / mass
force / gravity
material / in an object
14
A car's mass is 6.5x10
5
kg. If the force is 40,000, how long will it take to go from 0-40 m/s?
650 seconds
500 seconds
600 seconds
655 seconds
15
What is an inelastic collision?
stiff
sticky
hard
bouncy
16
What is inertia?
how fast something is moving
an object wants to keep doing what it is doing
friction
speed in a given direction
17
What is Einstein's First Postulate?
laws of nature upheld, only in inertial frame of reference
laws of nature
speed of light is same in every inertial frame of reference
for every action there is an equal and opposite reaction
18
What is an elastic collision?
sticky
hard
bouncy
stiff
19
What is net force?
sum of all forces acting on an object
push or pull
for every action, there is an equal & opposite reaction
uhhh........
20
An 8 kg ball is rolling in a line. If its momentum is 16 kg m/s, how fast is it traveling?
4 m/s
2.2 m/s
1 m/s
2 m/s
21
Einstein said gravity was a ____ caused by ___________.
pull / mass
push / curve of spacetime
force / nature
force / apple
22
What is the Conservation of Momentum?
in absence of an external force, momentum remains unchanged
when there is no change to the total system
used to show direction of all forces acting on object
acts in the opposite direction of motion
23
How long would it take a piece of glass to hit the ground from a 215 meter building?
5.5 seconds
7 seconds
6.6 seconds
5 seconds
24
What is the mass of a plane when it accelerates at 150 m/s
2
with a force of 3x10
3
N?
100000 kg
20 kg
25 kg
50 kg
25
What is Einstein's Second Postulate?
for every action there is an equal and opposite reaction
speed of light is same value regardless of the source
laws of physics the same in every initial frame of reference
laws of nature
26
What is Newton's First Law?
law of inertia
F=ma
push or pull
for every action, there is an equal & opposite reaction
27
What is Newton's Third Law?
F=ma
law of inertia
for every action, there is an equal & opposite reaction
push or pull
28
An object falls from a building and hits the ground in 9 seconds. What is the distance it fell?
405 m
500 m
400 m
205 m
29
What is the force to accelerate a skateboard at 6 m/s
2
if the rider has a mass of 100 kg?
300 N
600 N
100 N
16.7 N
30
What is the definition of acceleration?
change in time
change in velocity
change in speed
change in gravity
31
What is the cause of tides?
difference of gravity pull from near to far side of Earth
the suns gravitational attraction
a black holes gravitational attraction
Earth being pulled toward the moon
