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Vera_Pavlovna [14]
3 years ago
10

4. What is the acceleration of the car in each section? b с d a

Physics
2 answers:
PilotLPTM [1.2K]3 years ago
4 0
Acceleration is the slope of a velocity time graph.

Units are all m/s ^2

a) 3
b) 0
c) -3
d) 1 - doesn’t LOOK like a slope of 1, but if you look carefully at the Y axis, you can see it rises by 4 rather than 2.
makvit [3.9K]3 years ago
3 0

Answer:

0-4 acceleration comes at 12 m/s where (B) stagnates at 12 m/s and remains for 4 seconds (C) is breaks being activated slowing the car to 6 m/s in 2 seconds and (D) over the course of 4 seconds brings the car to 10 m/s.

Explanation:

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The temperature of an object can be raised by adding _________ or doing _________ on a system.
Nookie1986 [14]
D is the answer because you cause heat by exerting energy
7 0
4 years ago
A rock formed with 1,000 atoms of a radioactive parent element, but only contains 250 radioactive parent atoms today. If the hal
alisha [4.7K]

Answer:

age of rock is 2 million years

Explanation:

M_{R}=\frac{M_{O} }{2^{n} }

Where M_{R} is mass remaining

            M_{R} is original mass

         n= t/t(1/2) , which is the ratio of time to half life

M_{O} = 1000atoms

M_{R} =250 atoms

250 =\frac{1000}{2^{n} }

2^{n} = \frac{1000}{250}\\  2^{n} =4\\2^{n}  = 2^{2}\\ n=2

n =\frac{t}{t\frac{1}{2} }

t =t(1/2) *n

t(1/2) =1000000 years

t=1000000 *2

t=2,000,000 years

8 0
3 years ago
What is uniforlmly acelerated motion and uniform motion​
steposvetlana [31]

Uniformly Accelerated motion : When a body moves along a straight line and its velocity increases by equal amounts in equal interval of time then the motion is called uniformly accelerated motion. E.g.:- Motion of a freely falling body.

Uniform Motion : When a body covers equal distances in a straight line, equal intervals of time are called uniform motion. Example: a car moving at 20km/h in a straight line. When a body covers unequal distance in equal intervals of time in a straight line is called non-uniform Example : spinning wheel.

<h3>Difference About Uniformly Accelerated motion And Uniform Motion</h3>

In Uniform Velocity Motion a body will be moving with a constant /unchanging velocity moving in a particular direction and thus acceleration will be zero whereas in Uniform accelerated motion a body will move at constant acceleration and its velocity will keep changing with time at a constant/ steady rate.

<h2>IF YOU THINK MY ANSWER IS WRONG, CHANGE IT THANK YOU. </h2>
8 0
3 years ago
I need help on this.
AVprozaik [17]

Answer:

A. Total mass of each team

Explanation:

The side with the larger mass will end up pulling the side with the smaller mass

6 0
3 years ago
A pair of electrically charged objects attract each other with a force of 4 N when they are a distance of 3 m apart. If their ch
Rainbow [258]

Answer:

1 N

Explanation:

From coulomb's law,

The force of attraction between two charges is inversely proportional to the square of the distance between the charges.

From the question,

Assuming the charges are the same in both case,

F ∝ /r²....................... Equation 1

Fr² = k

F'r'² = Fr²........................... Equation 2

Where F' = First Force, r'² = First distance, F = second force, r² = second distance.

make F the subject of the equation,

F = F'r'²/r².................... Equation 3

Given: F' = 4 N, r' = 3 m, r = 6 m

Substitute into equation 3

F = 4(3²)/6²

F = 36/36

F = 1 N

7 0
3 years ago
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