Transcript b. To nearly its original height

Galileo found that a ball rolling down one
inclined plane would roll how far up
another inclined plane?
a.
The ball would not roll up the other
plane at all.
b.
To nearly its original height
c.
To about one quarter its original
height
d.
To nearly twice its original height
e.
To nearly half its original height
Galileo found that a ball rolling down one
inclined plane would roll how far up
another inclined plane?
a.
The ball would not roll up the other
plane at all.
b. To nearly its original height
c.
To about one quarter its original
height
d.
To nearly twice its original height
e.
To nearly half its original height
Friction is a force that always acts
a. perpendicular to an object's
motion.
b. opposite to an object's motion.
c. in the same direction as an
object's motion.
Friction is a force that always acts
a. perpendicular to an object's
motion.
b. opposite to an object's
motion.
c. in the same direction as an
object's motion.
The law of inertia states that an object
a.
will continue moving at the same
velocity unless an outside force acts on it.
b.
will continue moving in a straight line
unless an outside force acts on it.
c.
that is not moving will never move
unless a force acts on it.
d.
at rest will remain at rest unless
acted on by an outside force.
e.
will do all of the above.
The law of inertia states that an object
a.
will continue moving at the same
velocity unless an outside force acts on it.
b.
will continue moving in a straight line
unless an outside force acts on it.
c.
that is not moving will never move
unless a force acts on it.
d.
at rest will remain at rest unless
acted on by an outside force.
e. will do all of the above.
The law of inertia applies to
a. objects at rest.
b. moving objects.
c. both moving and nonmoving
objects.
The law of inertia applies to
a. objects at rest.
b. moving objects.
c. both moving and
nonmoving objects.
After a cannonball is fired into frictionless
space, the amount of force needed to keep it
going equals
a.
zero, since no force is necessary to keep
it moving.
b.
twice the force with which it was fired
c.
one half the force with which it was
fired.
d.
the same amount of force with which it
was fired.
e.
one quarter the force with which it was
fired.
After a cannonball is fired into frictionless
space, the amount of force needed to keep it
going equals
a.
zero, since no force is necessary to
keep it moving.
b.
twice the force with which it was fired
c.
one half the force with which it was
fired.
d.
the same amount of force with which it
was fired.
e.
one quarter the force with which it was
fired.
If the force of gravity suddenly stopped
acting on the planets, they would
a.
spiral slowly towards the sun.
b.
continue to orbit the sun.
c.
move in straight lines tangent to their
orbits.
d.
spiral slowly away from the sun.
e.
fly straight away from the sun.
If the force of gravity suddenly stopped
acting on the planets, they would
a.
spiral slowly towards the sun.
b.
continue to orbit the sun.
c. move in straight lines tangent to
their orbits.
d.
spiral slowly away from the sun.
e.
fly straight away from the sun.
A sheet of paper can be withdrawn from
under a container of milk without
toppling it if the paper is jerked quickly.
The reason this can be done is that
a. gravity pulls very hard on the milk
carton.
b. the milk carton has very little
weight.
c. the milk carton has inertia.
d. none of the above
A sheet of paper can be withdrawn from
under a container of milk without
toppling it if the paper is jerked quickly.
The reason this can be done is that
a. gravity pulls very hard on the milk
carton.
b. the milk carton has very little
weight.
c. the milk carton has inertia.
d. none of the above
The force required to maintain an object
at a constant speed in free space is equal
to
a.
b.
c.
d.
e.
the mass of the object.
the weight of the object.
zero.
the force required to stop it.
none of the above
The force required to maintain an object
at a constant speed in free space is equal
to
a.
b.
c.
d.
e.
the mass of the object.
the weight of the object.
zero.
the force required to stop it.
none of the above
One object has twice as much mass as
another object. The first object also has
twice as much
a.
b.
c.
d.
velocity.
gravitational acceleration.
inertia.
all of the above
One object has twice as much mass as
another object. The first object also has
twice as much
a.
b.
c.
d.
velocity.
gravitational acceleration.
inertia.
all of the above
Compared to its weight on Earth, a 10kg object on the moon will weigh
a.
b.
c.
the same amount.
less.
more.
Compared to its weight on Earth, a 10kg object on the moon will weigh
a.
b.
c.
the same amount.
less.
more.
Compared to its mass on Earth, the
mass of a 10-kg object on the moon is
a.
b.
c.
the same.
more.
less.
Compared to its mass on Earth, the
mass of a 10-kg object on the moon is
a.
b.
c.
the same.
more.
less.
You would have the largest mass of
gold if your chunk of gold weighed 1 N
on
a.
b.
c.
Earth.
Jupiter.
the moon.
You would have the largest mass of
gold if your chunk of gold weighed 1 N
on
a.
b.
c.
Earth.
Jupiter.
the moon.
Which has more mass, a kilogram of
feathers or a kilogram of iron?
a. The feathers
b. The iron
c. Neither—they both have the same
mass.
Which has more mass, a kilogram of
feathers or a kilogram of iron?
a. The feathers
b. The iron
c. Neither—they both have the
same mass.
An object weighs 30 N on Earth. A
second object weighs 30 N on the moon.
Which has the greater mass?
a.
b.
c.
d.
The one on Earth
The one on the moon
They have the same mass.
Not enough information to say
An object weighs 30 N on Earth. A
second object weighs 30 N on the moon.
Which has the greater mass?
a.
b.
c.
d.
The one on Earth
The one on the moon
They have the same mass.
Not enough information to say
You and a friend are jumping on a trampoline. Why
does Earth, which is rapidly orbiting around the sun,
not move under your feet when you jump?
a.
There are different rules in space and on the
surface of the earth
b.
Newton’s first law holds that your body moves
along with Earth because it is not compelled to change
its motion by an unbalanced force.
c.
Newton’s second law holds that the
acceleration produced by the force of gravity is offset
by the force of friction on your feet.
d.
Newton’s third law holds that there is an equal
and opposite force exerted by the trampoline on your
feet, which allows you to move with Earth through
space.
You and a friend are jumping on a trampoline. Why
does Earth, which is rapidly orbiting around the sun,
not move under your feet when you jump?
a.
There are different rules in space and on the
surface of the earth
b.
Newton’s first law holds that your body
moves along with Earth because it is not
compelled to change its motion by an
unbalanced force.
c.
Newton’s second law holds that the
acceleration produced by the force of gravity is offset
by the force of friction on your feet.
d.
Newton’s third law holds that there is an equal
and opposite force exerted by the trampoline on your
feet, which allows you to move with Earth through
A pencil lies on your desk. If the Earth is
moving around the sun at a speed of 30
km/s, how fast is the pencil moving relative
to the desk? How fast is the pencil moving
relative to the sun?
a.
0 km/s; 0 km/s
b. 0 km/s; 30 km/s
c.
30 km/s; 30 km/s
d. There is not enough information to
answer these questions.
A pencil lies on your desk. If the Earth is
moving around the sun at a speed of 30
km/s, how fast is the pencil moving relative
to the desk? How fast is the pencil moving
relative to the sun?
a.
0 km/s; 0 km/s
b. 0 km/s; 30 km/s
c.
30 km/s; 30 km/s
d. There is not enough information to
answer these questions.
Speed is
a.
a measure of how fast something is
moving.
b. always measured in terms of a unit of
distance divided by a unit of time
c.
the distance covered per unit time.
d. all of the above.
e. none of the above.
Speed is
a.
a measure of how fast something is
moving.
b. always measured in terms of a unit of
distance divided by a unit of time
c.
the distance covered per unit time.
d. all of the above.
e. none of the above.
One possible unit of speed is
a.
b.
c.
d.
e.
miles per hour.
light years per century.
kilometers per hour.
all of the above.
none of the above.
One possible unit of speed is
a.
b.
c.
d.
e.
miles per hour.
light years per century.
kilometers per hour.
all of the above.
none of the above.
When you look at the speedometer in a
moving car, you can see the car's
a.
b.
c.
d.
e.
average distance traveled.
instantaneous acceleration.
average speed.
instantaneous speed.
average acceleration.
When you look at the speedometer in a
moving car, you can see the car's
a.
b.
c.
d.
e.
average distance traveled.
instantaneous acceleration.
average speed.
instantaneous speed.
average acceleration.
Suppose you take a trip that covers
550 km and takes 5 hours to make.
Your average speed is
a.
b.
c.
d.
e.
55 km/h.
110 km/h.
160 km/h.
20 km/h.
2750 km/h.
Suppose you take a trip that covers
550 km and takes 5 hours to make.
Your average speed is
a.
b.
c.
d.
e.
55 km/h.
110 km/h.
160 km/h.
20 km/h.
2750 km/h.
Acceleration is defined as the CHANGE
in
a. time it takes to move from one
place to another place.
b. velocity of an object.
c. distance divided by the time
interval.
d. velocity divided by the time
interval.
e. time it takes to move from one
speed to another speed.
Acceleration is defined as the CHANGE
in
a. time it takes to move from one
place to another place.
b. velocity of an object.
c. distance divided by the time
interval.
d. velocity divided by the time
interval.
e. time it takes to move from one
speed to another speed.
Suppose you are in a car that is going
around a curve. The speedometer reads a
constant 30 miles per hour. Which of the
following is NOT true?
a.
You and the car are accelerating.
b. Your acceleration is constantly
changing.
c.
Your velocity is constant.
d. Your direction is constantly changing.
e. Your speed is constant.
Suppose you are in a car that is going
around a curve. The speedometer reads a
constant 30 miles per hour. Which of the
following is NOT true?
a.
You and the car are accelerating.
b. Your acceleration is constantly
changing.
c. Your velocity is constant.
d. Your direction is constantly changing.
e. Your speed is constant.
A car starts from rest and after 7
seconds it is moving at 42 m/s. What is
the car’s average acceleration?
a.
b.
c.
d.
e.
0.17 m/s2
1.67 m/s2
6 m/s2
7 m/s2
none of the above
A car starts from rest and after 7
seconds it is moving at 42 m/s. What is
the car’s average acceleration?
a.
b.
c.
d.
e.
0.17 m/s2
1.67 m/s2
6 m/s2
7 m/s2
none of the above
Suppose a car is moving in a straight line
and steadily increases its speed. It moves
from 35 km/h to 40 km/h the first second
and from 40 km/h to 45 km/h the next
second. What is the car’s acceleration?
a.
b.
c.
d.
e.
5 km/h·s
10 km/h·s
35 km/h·s
40 km/h·s
45 km/h·s
Suppose a car is moving in a straight line
and steadily increases its speed. It moves
from 35 km/h to 40 km/h the first second
and from 40 km/h to 45 km/h the next
second. What is the car’s acceleration?
a.
b.
c.
d.
e.
5 km/h·s
10 km/h·s
35 km/h·s
40 km/h·s
45 km/h·s
A car accelerates at 2 m/s2. Assuming
the car starts from rest, how much
time does it need to accelerate to a
speed of 20 m/s?
a.
b.
c.
d.
e.
2 seconds
10 seconds
20 seconds
40 seconds
none of the above
A car accelerates at 2m/s2. Assuming
the car starts from rest, how much
time does it need to accelerate to a
speed of 20 m/s?
a.
b.
c.
d.
e.
2 seconds
10 seconds
20 seconds
40 seconds
none of the above
What is the Average speed of swimmer C in
kilometers per min?
What is swimmers A’s average speed during the
time period of 10 min to 20 min.?
A) What is acceleration
B) IF the speed of a car is a
constant 20 m/s, then why is a car
accelerating as it rounds a curve?
(Explain answer in terms of
direction, velocity, and
acceleration)
It is now 10:29 AM but when the bell rings at 10:30AM David
will be late for Science Class for the third time this week. He
must get from one side of the school to the other by
hurrying down three different hallways. He runs down the
first hallway, a distance of 35.0m, at a speed of 3.5m/s. The
second hallway is filled with students, and he covers its 48.0m
length at an average speed of 1.2m/s. The final hallway is
empty, and David sprints its 60.0m length at a speed of
5.00m/s
A) Does David make it to class on time or does he get
detention form being lat again? (If David does make it on
time, by how much time does he make it to class early. Or
if David does not make it on time, how late is he for class.)
B) Draw a distance vs time graph of the situation.