Refer to the position time graph provided to answer questions #1 thru 5.
1. What is the instantaneous velocity of the object at 5 s?
2. What is the distance the object moves from 0 to 9 seconds?
3. What displacement did the object have between 2 s and 9 s?
4. What was the object's average velocity over the first 5 seconds?
5. How many times does the object change direction of travel? (time zero
does not count and standing still does not count as a direction change)
Answers
Answer:
Explanation:
1). To calculate the instantaneous velocity of the object, we will calculate the slope of the line CD.
Since line CD is a straight line, therefore, slope = 0
Hence instantaneous velocity = 0
2). Distance of the object when it moves from 0 to 9 seconds
= Distance traveled from (A to B + B to C + C to D + D to E)
= 3 + (3 + 0.5) + 0 + 0.5
= 7 m
3). Displacement = Distance between initial and the final positions of the object
= 3 - 0
= 3 m
4). Average velocity = [tex]\frac{\text{Displacement}}{\text{Time}}[/tex]
= [tex]\frac{0.5}{5}[/tex]
= 0.1 m per sec
5). Direction changes have been seen at t = 2 sec and t = 4 sec.
Hence object changed its direction of travel 2 times.
Related Questions
In general, which factor is NOT critical when beginning an exercise program? A. using appropriate protective equipment during exercise B. finding friends who like to exercise the same way you do C. seeing your doctor for a physical assessment prior to beginning exercise D. choosing clothing that is designed to match your exercise program Please select the best answer from the choices provided.
O A
О В
O C
PLEASE HELP!!!
Answers
Answer:
B. I looked it up I hope it's right
Explanation:
i hope this helps.
Answer:
its obviously C
Explanation:
i smart like dat
What claim can you make about the relationship between energy and mass?
Answers
A man is paddling a kayak with the force of 254 N, at an acceleration of 1.39 m/s2. If the kayak weighs 30 kg, what is the mass of the man?
Answers
see attached photo below!
Answers
Answer:
0 m/s²
Explanation:
Velocity is the slope of the position vs time graph. The graph is linear, so the velocity is constant. Since the velocity is constant, the acceleration is 0.
define the focus of a concave lens
Answers
Answer:
Principal focus of concave lens -
★ The point at which rays parallel to principal axis coming from infinity appear to converge after being refracted from concave lens is called the principal focus of concave lens.
________________________
• Additional information -
★ Principal focus - A number of rays parallel to the principal axis after reflection from a concave mirror meet at a point on the principal axis or appear to come from a point after reflection from a convex mirror on the principal axis. This is called principal focus.
Please help me fast and i brainliest!! Two balls are released from the same height. Ball A is released on the surface of Earth, and ball B is released on the surface of the moon. The mass and net force on each ball are recorded in the table. Net Force (N) Mass (kg) Ball A 19.6 2 Ball B 9.6 6 Ball C 6.6 ? Which statement is correct about the mass of ball C, which is released on the surface of the moon from the same height? The mass of ball C is less than the masses of ball A and ball B. The mass of ball C cannot be determined from the information provided. The mass of ball C is greater than the masses of ball A and ball B. The mass of ball C is greater than the mass of ball A but less than the mass of ball B
Answers
Answer:
If they both start at the same height then most likely that means that each has an intical velocity and a net force sooooo ball A 19.6
Explanation:
Answer: The mass of ball C is greater than the mass of ball A but less than the mass of ball B.
What is the average of 255, 242, 245?
Answers
Answer:
The average is 247.33 if it is for the whole number then it is 247
Explanation:
I did it by adding it all together and dividing it by 3
Answer:
247.33 is the average.
Explanation:
To find the average of a set of numbers:
a. add them up.
b. divide by how many numbers there are.
SO:
a. 255 + 242 + 245 = 742.
b. 742 (total) divided by 3 (# of numbers) = 742/3 = 247.33.
Hope this helps!
What is the unit of measurement used in physics for speed?
Answers
Answer: metre per second
The unit of speed is the metre per second, but the most common speed in everyday usage is the kilometre per hour in the US and the UK, miles per hour.
Which phrase describes a scientific law?
Answers
Answer:
a scientific law must be universally correct there could be no contradictions regarding the law anywhere
PLEASE HELPPP YALL
Please help me with this question; with steps though because I have to show my work. Thank you. I'll give brainliest to first response and five star ratings!! Please helppppp
Answers
Explanation:
Just shift everything except r to the other side.
[tex]r = \sqrt{ \frac{3v}{\pi \: h} } [/tex]
y
4
3
2
1
+ +
-4 -3 -2 -1
-1
1
1
2.
1 2
-3+
-4-
What is the slope of the line?
Answers
Answer:
easy no cheater
Explanation:
A seesaw pivots as shown in below. What is the net torque about the pivot point?
With explanation please
I GIVE 25 POINTS
Answers
Answer:
2.3 Nm clockwise
Explanation:
Take counterclockwise to be positive and clockwise to be negative.
∑τ = (3 N) (2.5 m) − (7 N) (1.4 m)
∑τ = 7.5 Nm − 9.8 Nm
∑τ = -2.3 Nm
The net torque is 2.3 Nm clockwise.
Does a calculation lose any information when converted from centimeters to meters? Explain
Answers
Answer:
No
Explanation:
There are many units that are used to measure length of an object. For example centimeters, meters, millimeters etc.
There is a relationship between any of two units to measure lengths. If we want to convert some length from cm to m, it can be done as follows :
1 cm = 0.01 m
or
1 m = 100 cm
When we use this conversion, the calculation remains the same. Only the way to represent it will be different.
Hence, there is no lose of information when converted from centimeters to meters.
Which sentence describes Newton's second law?
O A. Two forces are unbalanced if they are unequal or they are not
acting in opposite directions.
O B. When the forces on an object are balanced, the object does not
move.
C. Larger net forces are required to accelerate objects that have
more mass.
D. The action force applied by one object to another is equal in
magnitude to the reaction force.
Answers
Answer: Larger net forces are required to accelerate objects that have more mass
Explanation:
what is 404.2 rounded to the nearest ten thousandth?
Answers
Answer:
The answer to your question is 404.2000
A car is traveling at 40 m/s. If it travels for 30 s how far will it travel.
Answers
Answer:
okay I might be wrong but it was an answer i had in like fifth grade MAYBE 1,200 meters
Explanation:
How long would it take Jesse with an acceleration of -2.50 m/s^2 to bring his bicycle with an initial velocity of 13.5 m/s to a complete stop?
a.6.1 s
b.3.7 s
c.12.1 s
D.5.4 s
Answers
Answer:
use first equation of motion v=u+at..v is 0..since we have to take him to rest and u is 13.5
Explanation:
u = 13.5 m/s
a = - 2.5 m/s^2
v = u + at
0 = 13.5 - 2.5 * t
t (time to reach a complete halt) = 5.4 sec
QUESTION: Is there a relationship between height and shoe size? Write a one sentence
summary of your graph.
J
Answers
Answer:
There is no particular relationship between the height and shoe size. But the shoe sizes in males is usually bigger than females. And the shoe size tends to get bigger when the person is taller.
Explanation:
What other angle would give the same range at 19 degrees?
Answers
Answer:
I think it is acute angle.
Explanation:
Because it is an angle between 0° and 90°. Hope this answer wil help you.
Hope this helps :)
If an object is moving and it changes its position by 2 min
every 4 s starting from the origin, then the position vs. time
graph is:
Answers
Answer: a straight line with a positive slope
Explanation:
If an object is moving and it changes its position by 2 units every 4 s starting from the origin,
What is speed?The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is meter/second.
Learn more about speed from here If an object is moving and it changes its position by 2 units every 4 s starting from the origin,
speed = distance /time
= 2 units / 4 seconds
= 0.5 units/seconds
Thus, the speed of the object would be 0.5 units /seconds
brainly.com/question/7359669
#SPJ6
the question seems incomplete the complete question is If an object is moving and it changes its position by 2 units every 4 s starting from the origin, then the position vs. time graph is
what is acceleration of a 12 kg cart if a net force of 144 N is applied on it?
Answers
Answer:
The correct answer is I just did the quiz
Force,F=144N
Mass,m=12Kg
Force=Mass*Acceleration
144=12*a
12a=144
a=12
I need help finding the average acceleration fo tyler and bree
Answers
WILL GIVE BRAINILY TO FIRST PERSON TO ANSWER!!!!
Complete this sentence. If volume remains the same while the mass of a substance ________, the density of the substance will_______________. increases, stay the same decreases, stay the same decreases, increase increases, increase
Answers
The answer is increase.
d = m/v. if you increase the mass without changing the volume, the density will increase.
can someone give me the answers to this question
Answers
Answer:
Rubbing his hand and ironing is Mechanical Energy being transformed into Thermal Energy.
Throwing a rock vertically in using Kinetic Energy, it then transforms into Gravitational Energy as the rock falls.
Explanation:
First, as Kwane rubbing his and and iron his clothes using the energy to create heat, that is thermal being transformed.
The rock being thrown uses kinetic energy and due to graviational force of the earth, it is being transformed into Potential Gravitational Energy.
A bicycle is going 2.6 m/s when it speeds up to 15.4 m/s in 8 seconds. What is the acceleration?
Answers
Answer:
acceleration is 1.6 m/s^2
Explanation:
This is a question involving Kinematics so we can use one of the kinematic equations.
Given info: Vi= 2.6 m/s. Vf= 15.4 m/s. T= 8s
We need to solve for acceleration
The best equation to use is (Vf = Vi + at) as it contains all the info we need to solve for acceleration.
Now substitute the values given into the equation.
Vf = Vi + at >> 15.4 = 2.6 + a8
Now solve for a by rearranging the equation.
15.4 -2.6= 8a >> 12.8=8a >> 12.8/8= 8a/8 >> 1.6 =a
NOTES:
Acceleration is the rate of increase of velocity
Vf is final velocity or velocity after acceleration/de-accaeleration occurs
Vi is intial velocity or velocity before acceleration or de-accaeleration occurs
Time is time it took for a certain motion to occur.
A rowboat that is traveling 2.5m/s to the north, encounters a current traveling 4.3m/s to the east. What is the resultant velocity of the rowboat, including the angle?
Answers
A car enters a freeway with a speed of 6.5 m/s and accelerates to a speed of 24 m/s in 3.5 min. How far does the car travel while it is accelerating? (Hint: find the acceleration first)
a 3205.5 m
b 1548.75 m
c 76.13 m
d 761.3 m
Answers
Explanation:
Using Equations of Motion :
(1) v = u + at
24 = 6.5 + a * 210
a (Acceleration) = 0.083 m/s^2
(2) v^2 = u^2 + 2aS
S = 576 - 42.25 / 0.166
S (Distance travelled) = 3215.3 m
(Option A seems a typo since the answer is 3215.3 m)
Is the answer C or B
Answers
Answer:
c
Explanation:
though c is wider it has more water.
The answer is *C* Because The C Jar is Wider than others so it holds more water
what is the volume of a mineral
Answers
Answer:
calculate the volume of each sample by subtracting the intial water volume from the volume after the sample was added . Record the volume of each sample on your chart in mililiters(ML).
Explanation:
Describe all of the forces acting on the ice cream in the root beer float. Relate these forces to the fact that the ice cream is floating
Answers
Answer: Sample Response: The root beer exerts a force on all sides of the ice cream. These forces are all equal and cancel each other out. Gravity pushes downward on the ice cream. This can also be called the weight of the ice cream. Buoyant force pushes the ice cream upward. The ice cream floats because the buoyant force is greater than the weight of the ice cream.
Answer:
The root beer exerts a force on all sides of the ice cream. These forces are all equal and cancel each other out. Gravity pushes downward on the ice cream. The ice cream floats because the buoyant force is greater than the weight of the ice cream.
Explanation: