physics unit 3
What is the speed of an object at rest?
0.0 m/s
according to the graph above, during which interval does the cat have the greatest positive velocity
0.0-5.0s
a ball is thrown straight up. at the top of its path its velocity is
0m/s^2
according to the graph above, the cat has the fastest speed during which interval
10-15 sec
According to the graph above, the cat has the fastest speed during which interval?
10-15s
Acceleration due to gravity is also called
free-fall acceleration
acceleration due to gravity is also called
free-fall acceleration
which does the graph illustrate about acceleration.
goes up then down then up. the acceleration varies
When you look at the speedometer in a moving car, you can see the car's
instantaneous speed
the graph above describes the motion of a cyclist. the graph illustrates that the acceleration of the cyclist
is constant
what is the SI unit of acceleration
m/s/s
What is the SI unit of acceleration?
m/s^2
The graph above describes the motion of a ball. At what point is the velocity of the ball equal to its velocity at B?
not A, c or d
Suppose you are given a position versus time graph. The slope of this graph describes what quantity?
velocity
Acceleration is defined as the CHANGE in
velocity divided by the time interval
acceleration is defined as the change in
velocity divided by the time interval
Which of the following line segments on a position versus time graph is physically impossible?
vertical line
In the graph above, a toy car rolls from +3 m to +5 m. Which of the following statements is true?
xi = +3 m
In the graph above, a toy car rolls from +3m to +5m. Which of the following statements is true?
xi= + 3m
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?
your velocity is constant
zander is walking in the quad minding his own business when all of a sudden he feels bird poop hit his head. chase noticed the poop fell for about 5 sec. how high above the ground was the bird when he made the decision to bomb zander?
122.5 m
Zander is walking in the quad minding his own business when all of a sudden he feels something hit his head. Chase starts to laugh and tells Zander that a bird just pooped on him. Chase noticed that the poop fell for 3 seconds. How high above the ground was the bird when he made the decision to bomb Zander.
44.1 m
according to the graph above, during which interval FIX
5-10 s
According to the graph above, during which interval is the cat at rest?
5-10s
A ball is thrown straight up. At the top of its path its acceleration is
9.8m/s/s
Which of the following situations represents a negative displacement? (Assume positive position is measured vertically upward along a y-axis.)
A cat jumps from a tree limb to the ground.
The graph above describes the motion of a ball. At what point does the ball have a velocity of zero?
C
The graph above describes the motion of a ball. At what point is the speed of the ball equal to its speed at B?
D
In the graph above, how does the acceleration at A compare with the acceleration at B?
The accelerations at A and B are each zero.
which of the following situations represents. a positive displacement? assume positive positions measured vertically upward along a y-axis
a cat jumps from the ground onto a tree limb
Suppose an object is in free fall. Each second the object falls
a larger distance than in the second before
Speed is
a measure of how fast something is moving. always measured in terms of a unit of distance divided by a unit of time. the distance covered per unit time.
which of the following line segments on a position vs time graph is physically impossible
a vertical line
In the absence of air resistance, objects fall at constant
acceleration
in the absence of air resistance, objects fall at a constant
acceleration
suppose you are given a velocity vs time graph. the slope of this graph describes what quantity
acceleration
when you look at the odometer in a moving car, you can see the cars
average distance traveled
the graph above describes the motion of a ball. at what point does the ball have a velocity of 0
c
If you drop a feather and a coin at the same time in a tube filled with air, which will reach the bottom of the tube first?
coin
The graph above describes the motion of a cyclist. The graph illustrates that the acceleration of the cyclist
constant
the graph above describes the motion of a ball. at what point is the speed of the ball equal to the speed at b
d
If you know the acceleration of a car, its initial velocity, and the time interval, which of the following can you predict?
displacement of the car, direction of the cars final velocity, magnitude of the cars final velocity
speed is
distance covered per unit of time, measure of how fast something is moving, always measured in terms of a unit of distance divided by a unit of time
The graph above describes the motion of a cyclist. During the interval shown, the cyclist is
speeding up
The graph above describes the motion of a cyclist. during the interval shown the cyclist is
speeding up
in the graph above how does the acceleration at A compare with the acceleration at b
the acceleration at a and b are 0
When a car's velocity is positive and its acceleration is negative, what is happening to the car's motion?
the car slows down
When a car's velocity is negative and its acceleration is negative, what is happening to the car's motion?
the car speeds up
when a cars velocity is positive and its acceleration is positive, what os happening to the cars motion
the car speeds up
a ball is thrown upwards and then caught when it comes back down. in the absence of air resistance the speed of the ball at the halfway mark on its way back down would be
the same as the speed it had when thrown upwards
A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the speed of the ball when caught would be
the same as the speed it had when thrown upwards. (no air resistance)
