A car’s brakes decelerate it at a rate of -2.20 m/s2. If the car is originally travelling at 17 m/s and comes to a stop, then how far, in meters, will the car travel during that time?
Answer:
x = 65.68 [m]
Explanation:
To solve this problem we must use the following equation of kinematics.
[tex]v_{f}^{2}=v_{o}^{2}-2*a*x[/tex]
where:
Vf = final velocity = 0 (comes to stop)
Vo = initial velocity = 17 [m/s]
a = desaceleration = -2.2 [m/s²]
x = displacement [m]
Now replacing, we have:
[tex](0)^{2}=(17)^{2}-2*(2.2)*x\\4.4*x = 289\\x = 65.68 [m][/tex]
An object starts at 16 m/s with an acceleration of 4.5 m/s? How far does it go in 9.0 seconds?
Why can humans float in space but not on Earth?
Donny, who has a mass of 75.0 kg, is riding at 25.0 m/s in his truck when he suddenly slams on the brakes to avoid hitting a squirrel crossing the road. His seatbelt brings his body to a stop in 0.500 seconds. What force does the seatbelt exert on him?
Answer:
F = 3750 N
Explanation:
Given that,
Mass of Donny, m = 75 kg
Initial speed, u = 25 m/s
He suddenly slams on the brakes to avoid hitting a squirrel crossing the road, final speed = 0
Time, t = 0.5 s
We need to find the force the seatbelt exert on him. The force is given by :
F = ma
a is acceleration
[tex]F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{75\times (0-25)}{0.5}\\\\=-3750\ N[/tex]
So, the force is 3750 N.
The force the seatbelt exert on him is 3750 N
Using Newton's third law
f = ma
where
m = mass
a = acceleration
a = v - u / t
where
v = final velocity
u = initial velocity
t = time
Therefore,
f = m(v - u / t)
m = 75 kg
u = 25 m/s
t = 0.500 secs
v = 0 m/s (The car will stop because he applied a brake)
f = 75 × (0 - 25 / 0.5)
f = 75 × -25 / 0.5
f = 75 × -50
f = - 3750
f = 3750 N
read more: https://brainly.com/question/17372829?referrer=searchResults
Charges are of two kinds—negative charges and ________________ charges. __________ amounts of both kinds of charges are found in every piece of matter.
Answer: the first is positive and second is equal
Explanation:
Answer: 1. Positive
Explanation:
Because there is negative charges and positive charges
STOP WHAT UR DOING!!! TAKE A MOMENT TO THINK ABOUT THESE!!
Cops pulling you over for speeding is like the adult version of teachers telling you not to run in the hallways.
Nothing makes sense, pizzas are round, the boxes we put them in are square and we eat them as triangles.
Some Scooby Doo episodes would be a lot shorter if they just went to the costume store first and asked a couple of questions.
I wonder if my cat thinks the delivery guy is my owner because he gives me food.
enjoy!!
Answer:
lol
can i have brainllest
Explanation:
Think of this how can a camera have a circler lens but take rectangular photos
PLEASE HELP ME IM TIMED
In how many ways can chemical reaction takes place? what are they?
Answer:
Chemists classify chemical reactions in a number of ways: by type of product, by types of reactants, by reaction outcome, and by reaction mechanism. Often a given reaction can be placed in two or even three categories, including gas-forming and precipitation reactions.
Explanation:
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PLEASE HELP ME! IM TIMED
Answer:
Toothpaste
Because it is viscous
If you are test-driving a Bugatti Veyron and you go from 0 m/s to 124 m/s in 3.7 seconds, what was your acceleration?
Answer:
initial velocity (u) = 0 m/s
Final velocity (v) =124 m/s
Time (t) = 3.7 s
acceleration (a) =?
Now
A =V-U /T
= 124-0 /3.7
= 33.51 m/s^2
what is the KE of a 1.00 kg hammer swinging at 20.0 m/s? 200 Joules
I know the answer I just need help understanding it.
Answer:
Explanation:
From the question given above, the following data were obtained:
Mass (m) = 1250 kg
Velocity (v) = 20.0 m/s.
Kinetic energy (K.E) =?
Kinetic energy is simply defined as energy possed by a body in motion. Mathematically, it is expressed as:
K.E = ½mv²
Where:
K.E is the kinetic energy
m is the mass of the object
v is the velocity of the object.
Thus, we can obtain the kinetic energy of the automobile by using the above formula as illustrated below:
Mass (m) = 1250 kg
Velocity (v) = 20.0 m/s.
Kinetic energy (K.E) =?
K.E = ½mv²
K.E = ½ × 1250 × 20²
K.E = 625 × 400
K.E = 250000 J
Therefore, the kinetic energy of the automobile is 250000 J
6th grade science I mark as brainliest.
Answer:
Solution:-Distance =400m
Time=20s
We need to find speedAs we know that
[tex]{\boxed{\sf speed \dfrac {Distance {}_{(d)}}{Time {}_{(t)}}}}[/tex]
Substitute the values[tex]\LARGE\leadsto\sf speed=\dfrac {400}{20}[/tex]
[tex]\LARGE\leadsto\sf 20m/s[/tex]
PLEASE HELP ASAP 2. Two rocks with a mass of 5 kilograms and 10 kilograms, respectively, fall freely from rest near
the Earth's surface. After 3 seconds of free-fall, compared to the 5-kg rock, the 10-kg rock has
greater...
a. acceleration
b. momentum
c. height
d. velocity
e displacement
Answer:
i Think momentum
Explanation:
A warehouse worker pushed a cart weighing 4.50 kg to the top of an inclined plane. Initially, the cart was 0.670 m above the floor. If the top of the inclined plane is 2.70 m above the floor, calculate the work done by gravity as the worker pushed the cart to the top of the plane.
Answer:
- 89.523J
Explanation:
We solve the above question using work done(Potential Energy) formula
The formula =
-(mgh)
Where m = Mass = 4.50J
g = Acceleration due to gravity = 9.8m/s²
We are told in the question:
Initially, the cart was 0.670 m above the floor. If the top of the inclined plane is 2.70 m above the floor
Hence, the height =
2.70m - 0.670m = 2.03m
Work done = -(2.03m × 4.5kg× 9.8m/s²)
= - 89.523J
Select three effective methods for helping a friend who is showing self harming behavior
Answer:
Avoid judging or criticizing your friend.
Let your friend know that you care and want to help
Share the ways you cope with stress and other problems in your life
I had this question
A book that weighs 5 N sits on a table. What force does the table apply to the book?
Answer:
E =F.d =[1/2]mv^2
mad = [1/2]mv^2
d= v^2/2a ,v=u+at , v^2 = [at]^2 since u=0
So d = at^2/2
F = ma= 20a= 50 , a=5/2 and t=2
so d = [5/2][2^2]/2=5
Explanation:
Every action has an equal and opposite reaction. It is an action-reaction principle. Therefore the table exerts a force of 5 N on the book in order to be in stable condition.
What is Newton's third law of motion?Newton's third law of motion state that every action has an equal and opposite reaction. It is an action-reaction principle. It stated that the force always exists in a pair.
Therefore the table exerts a force of 5 N on the book in order to be in stable condition.
The given data in the problem is ;
W is the weight of the book sits on table = 5N
N is the normal force on the book
From the equilibrium equation ;
Weight -Normal force on the book =0
Weight =Normal force on the book
The normal force on the book =5N
Hence the table exerts a force of 5 N on the book in order to be in stable condition.
To learn more about Newton's third law of motion refer to the link;
https://brainly.com/question/1077877
What is the period of a rotating object if it spins 24 times in 13 seconds?
Answer:
The period is 0.54 seconds
Explanation:
Period (T)
Is the time required for a rotating object to make one complete revolution around a circular path.
If it takes a time t to complete n revolutions, the period is:
[tex]\displaystyle T=\frac{t}{n}[/tex]
The rotating object spins n=24 times in t=13 seconds, thus its period is:
[tex]\displaystyle T=\frac{13}{24}[/tex]
T = 0.54 sec
The period is 0.54 seconds
Two students are studying for a Science Test. On the table, they had a glass of water and identical cell phones. Both of their phones had run out of battery, therefore they were both charging in the same wall outlet. One student’s charging cord was 3ft and the other student’s charging cord was 9ft. which of the phones charged the fastest using Ohm’s Law. Cite evidence to support your theory.
Answer:
The student with the 3ft charger
Explanation:
Because the electricity from the 3ft charger has a shorter distance to mooves than the 9ft one
Find the kinetic energy of a 3.5 kg cat that has a momentum of 0.22 kg • m/s.
A) 3.98 x 10^-5 J
B) 4.32 x 10^-4 J
C) 6.91 x 10^-3 J
D) 7.22 x 10^-2 J
Answer:
6.19*10^-3 J
Explanation:
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When you mix a solution, the mass of the substances before and after you mix them should be the same.true or false
Answer:
True
Explanation:
The mixing substances can be taken to be the reactants and the resulting mixture as the product. When the substances change state during mixing, the mass of the substances does not change meaning that the mass of the product will equal the mass of the reactants .This is true due to the law of conservation of mass.
Answer:
TRUE
Explanation:
because blablablabla blablolbleep scientific talk
What is the speed of an eagle that travels 200 meters in 4 seconds? A. 800 m/s2 B. 800 m/s C. 50 m/s2 D. 50 m/s
Answer:
The answer is D.
Explanation:
You have to apply distance formula :
[tex]distance = speed \times time[/tex]
[tex]let \: d = 200,t = 4[/tex]
[tex]200 = s \times 4[/tex]
[tex]4s = 200[/tex]
[tex]s = 200 \div 4[/tex]
[tex]s = 50 \: m {s}^{ - 1} [/tex]
An eagle travels 200 meters in 4 seconds
To find:-Speed of the eagle
Solution:-HereDistance=d=200m
Time=t=4s
As we know[tex]{\boxed{\sf Speed ={\dfrac{Distance{}_{(d)}}{Time{}_{(t)}}}}}[/tex]
Substitute the values[tex]\qquad\quad {:}\longmapsto\sf Speed=\dfrac {200}{4}[/tex]
[tex]\qquad\quad {:}\longmapsto\sf Speed=50m/s [/tex]
[tex]\therefore{\underline{\boxed{\bf Speed\:of\:eagle=50m/s}}}[/tex]
Hence Correct option is Da cannon launches a 3.0 kg pumpkin with 110J of kinetic energy. what is the pumpkin’s speed?
Answer:
v = 8.56 [m/s]
Explanation:
The kinetic energy can be calculated by means of the following equation.
[tex]E_{k}=\frac{1}{2}*m*v^{2}[/tex]
where:
m = mass = 3 [kg]
v = velocity [m/s]
Ek = kinetic energy [J]
[tex]110 = \frac{1}{2} *3*(v^{2} )\\v^{2} = 220/3\\v=\sqrt{73.333}\\v=8.56[m/s][/tex]
A 52 kg person is running 2.5 m/s. What is their momentum?
Answer:
130kg/ms
Explanation:
given data mass,52kgvelocity,2.5m/smomentum?from momentumM=mvMass=52kg
Velocity=2.5m/s
Momentum=?
We know that,
Momentum=Mass × velocity
Or,momentum=52kg× 2.5m/s
Or,momentum=130 kgm/s
So,the momentum is 130 kgm/s.
Please do all of i will give you brainlest and thanks to best answer plz do it right
Answer:
winter solstice i think
Explanation:
Answer:
a/ solar eclipse
Explanation:
because the moon is on the left side of earth
Integrated Science- 8th grade science
Please Help ASAP!
Its almost the end of semester And I need to fix my grade for science so PLEASE help!
its almost report cards time!
Answer:
I do believe it is A.
Explanation:
I hope this helps :)
Answer:I believe it is A
Explanation: B just doesn't seem like something an 8th grader would be learning about, and I'm not sure about the other ones.
a motorbike can travel 1000 meters in 10 minutes calculate how car it can travel in 1 sec.
Answer:
1.67meter
Explanation:
if it can travel 1000 meters in 10 minutes, 10 minutes are 600 secs (10×60), 1000÷600 is 1.67
Answer:
HI
Explanation:
Please help! Will mark brainliest!
Answer:
im pretty sure its d
Explanation:
Calculate the average speed of a runner who runs for 500 meters in 40 second HELP!
Answer:
12.5
Explanation:
500 divided by 40 = 12.5
Two ice-skaters are skating in circles on a frozen pond. Maria is making large circles with a radius of 12 m and skating 4.5 m/s. Her friend, Samantha, is making smaller circles with a radius of 6 m but is not skating as quickly, going only 3.8 m/s.
How could each skater increase her centripetal acceleration without changing the size of her path? Explain your reasoning.
Answer: Samantha has the largest centripetal acceleration of 2.4 m/s^2. Maria has only 1.69 m/s^2.
Explanation:
tarzans mass is 75kg. calculate his weight
Answer:
75kg=165.346697lbs
Explanation: F A T