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WorksheetsWalker Physics Chapter 4 study deck
Total questions: 63
Worksheet time: 1hrs 23mins
When any object is thrown through the air, the shape object's path can be described mathematically as _________________.
Linear
Curved
Hyperbolic
Parabolic
In projectile motion, the y component of the velocity thrown at an angle Θ can be found by which of the following?
vocosΘ
vossinΘ
votanΘ
vocotΘ
In solving projectile motion problems, motion in the x and y directions can be solved independently.
True
False
The greater the angle, Θ, at which an object is launched with the same initial velocity,
... the higher the object will go.
... the further the object will go.
... has no effect of either the height or distance the object will travel.
A ball is rolled off a table with velocity "v" in the horizontal direction and travels a distance of d. How far will the ball travel if the velocity is doubled?
d (there is no effect on the distance)
sqrt (d)
2d
There is not enough information to determine the distance.
Mary is running at 1.5 m/s to catch a plane and finds a moving walkway moving at a speed of 0.5 m/s. Madi is sitting drinking a latte watching the crazy lady run. What speed does Madi perceive Mary to be running?
1.0 m/s
1.5 m/s
2.0 m/s
3.0 m/s
A boy standing on a balcony drops one ball and throws another with an initial horizontal velocity of 3 m/s. Which of the following statements is accurate?
The balls fall with a constant vertical velocity and a constant horizontal acceleration.
The balls fall with a constant vertical velocity as well as a constant horizontal velocity.
The balls fall with a constant vertical acceleration and a constant horizontal velocity.
The balls fall with a constant vertical acceleration and an increasing horizontal velocity.
Tip is practicing with a slingshot -- dangerous I know -- so he can accurately play King David in a re-creation of the story of David and Goliath. He releases a 500 g stone after getting it going very quickly. What can be said about the path of the stone?
The stone continues in the circle because of Newton's First Law.
The stone quickly falls to the ground
The stone flies out at the same velocity in a line tangent to the circle at the moment of release.
None of the other questions adequately describe the stone's motion.
Estimate (using g=10.0m/s) the time it will take for a marble to reach the ground if it dropped off of the 10.0 m-high building.
0.7 s
1.4 s
2.0 s
4.5 s
What is a displacement?
a change in position
a change in the origin
a coordinate system
two different origin points
What is a vector?
a type of variable with the same origin point
a type of variable that includes direction as well as size
a variable with only positive values and shows direction
a displacement with no direction and no magnitude
A scalar does not depend on _____.
position
distance
magnitude
direction
All of the following are scalar values EXCEPT ____.
distance
mass
displacement
temperature
What is the difference between distance and displacement?
both show movement, so they are the same
one is a vector and the other is a scalar
distance shows direction, displacement does not
distance shows the origin, displacement does not
With a vector, what kind of information is carried by the positive and negative signs?
the direction
the size
the math function
the coordinates
What is the "magnitude" of a vector?
the units of the vector show magnitude
the sign of the vector shows magnitude
the length of the vector shows magnitude
the direction of the vector shows magnitude
The north-south axis and east-west axis provide what?
a distance point
a reference line
a positive and negative sign
a vector line
What shape does a projectile make?
Parabola
Hyperbola
Linear Line
Projectiles do not follow a predictable path
When solving two dimensional problems, what variable is shared between the x and y directions?
Acceleration
Displacement
Time
Velocity
Vectors in two dimensions are ___________
Opposite
Equal
Dependent
Independent
Two objects are released at the same time. One object is dropped in the vertical direction and one is launched horizontally into projectile motion. Which object hits the ground first?
Both hit the ground at the same time
The object dropped hits the ground first
The object launched horizontally hits the ground first
Unable to determine without further information
A soccer ball is kicked and follows the path as shown. At which point is the vertical acceleration equal to - 9.80 s2m ?
X
Y
Both X and Y
Neither X nor Y
Two identical balls, X and Y, are projected horizontally from the edge of a cliff. The path of each ball is shown in the picture. Which of the following statements are true (mark all that apply)?
They have the same initial horizontal speed
They have the same vertical acceleration
They have the same initial vertical velocity
They take the same amount of time to reach the water
A rock is thrown in the air as shown in the picture. At which point does vy = 0 sm ?
A
B
C
D
E
A rock is thrown in the air as shown in the picture. If it takes 5 seconds to reach point D, how long will take the rock to reach the ground from point D?
2.5 s
5 s
10 s
1 s
Based on the picture, how would you find the vertical component of the soccer ball's velocity?
20 sm×sin(30°)
20 sm×cos(30°)
20 sm×tan(30°)
20 sm
Based on the picture, how would you find the horizontal component of the soccer ball's velocity?
20 sm×sin(30°)
20 sm×cos(30°)
20 sm×tan(30°)
20 sm
When vectors form a right angle, we can find the resultant vector by using:
The quadratic equation
Addition
The Pythagorean Theorem
Subtraction
While at the airport, you walk on a moving walkway which moves with a speed of 1.80 m/s with respect to the surrounding corridor. You walk with a speed of 2.20 m/s with respect to the walkway. What is your speed with respect to the surrounding corridor?
4.00 m/s
0.40 m/s
3.96 m/s
1.22 m/s
Your boat's top speed is 10 m/s. If you travel at that stop speed but are fighting against a 2 m/s current, what is your speed relative to the shore?
5 m/s
20 m/s
12 m/s
8 m/s
When an object is undergoing projectile motion, which of the following are constant? Check all that apply.
vy
vx
ax
ay
A care package is dropped from a plane. Which of the paths shown in the picture will the package take?
A
B
C
D
E
This position vs. time graph shows an object...
not moving
moving with constant velocity
moving with changing velocity
This position vs. time graph shows an object...
not moving
moving with constant velocity
moving with changing velocity
This position vs. time graph shows an object...
not moving
moving with constant velocity
moving with changing velocity
This velocity vs. time graph shows an object...
(Hint: For this graph, the velocity is 0 m/s!)
not moving
moving with constant velocity
moving with changing velocity
This velocity vs. time graph shows an object...
not moving
moving with constant velocity
moving with changing velocity
This velocity vs. time graph shows an object...
not moving
moving with constant velocity
moving with changing velocity
This position vs. time graph shows an object...
not moving
moving with constant velocity
moving with changing velocity
This position vs. time graph shows an object...
not moving
moving with constant velocity
moving with changing velocity
This velocity vs. time graph shows an object...
not moving
moving with constant velocity
moving with changing velocity
Which of these position vs. time graphs shows an object changing direction?
Which of these velocity vs. time graphs shows an object changing direction?
This motion map shows an object...
not moving
moving with constant velocity
moving with changing velocity
This motion map shows an object...
not moving
moving with constant velocity
moving with changing velocity
This position vs. time graph shows an object...
speeding up
slowing down
This position vs. time graph shows an object...
speeding up
slowing down
A ball thrown straight up takes 8 total seconds to complete its journey all the way up and down. 1 second into its journey and 7 seconds into its journey the magnitude of its velocity will be ______________ and its direction _______________.
opposite, the same
the same, opposite
the same, the same
opposite, opposite
If a ball thrown straight up into the air takes 4 seconds to reach the top (peak), how long will it take to travel from the peak back to the original position?
0s
1s
3s
4s
The fact that an apple and a watermelon, dropped simultaneously from the same height, would hit the ground at the same time indicates that
you don't like apples or watermelons.
greater masses have greater acceleration.
lesser masses have greater acceleration.
acceleration is independent of mass.
The initial horizontal velocity of a projectile is ____ its final horizontal velocity.
less than
equal to
greater than
What is true about the vertical velocity of a projectile launched horizontally?
It is initially at its maximum value.
It increases due to gravity as it falls.
It remains constant throughout its trajectory.
It decreases as it falls due to gravity.
If two projectiles are launched at two different heights, 2m and 10m, which one will reach the ground first?
2m
10m
they both will hit the ground at the same time
Which hits the ground first if they start at the same height: a dropped ball or a ball launched with a
horizontal velocity?
the launched ball
the dropped ball
they both hit at the same time
An airplane traveling at constant velocity drops a bomb. Where is the airplane when the bomb hits the
ground?
above the bomb
before the bomb
past the bomb
What is the velocity of an object launched straight up at its highest point?
zero
equal to its vx
½ its maximum value
equal to gravity
The path followed by a projectile is also known as its
trajectory
range
height
vertical displacement
Once a projectile is launched, what is the only force that affects its motion?
mass
friction
inertia
gravity
The horizontal velocity of a projectile dropped from a moving object is the (a) as the velocity of the
moving object.
The vertical component of a projectile’s motion is (a) to the horizontal component of its
motion.
Which of the following statements about the horizontal and vertical components of projectile motion is true?
Changes in the horizontal component occur only when the vertical component changes.
Both the horizontal and vertical components are always constant.
The vertical component changes while the horizontal component stays the same.
The horizontal and vertical components are dependent of each other.
Which of the following would NOT be considered a projectile?
A cannonball fired towards a distant castle.
A cannonball rolling down a slope.
A cannonball fired straight outward from a castle wall.
A cannonball after it rolls off the edge of a cliff.
Victor Velocity is standing on top of the roof of his house, firing stones with his slingshot over a level field. He is aiming straight outward, horizontally. If Victor pulls back harder on the sling to shoot a stone, which of the following quantities will be changed?
The vertical displacement of the stone.
The distance the stone travels, and the horizontal velocity.
The time it takes the stone to strike the ground, and the horizontal velocity.
