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Sergio039 [100]
3 years ago
9

Guys I need the answer ASAP

Physics
1 answer:
kati45 [8]3 years ago
3 0

Answer:

cnbzdbhvhndjcn bvhdbvjsdhvjsbdjcbhkavwhe4w7334856743534685347856784687367856732346356675ygafjdbvc

Explanation:

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QUESTION 7
ryzh [129]

Answer:

<em>The force required is 3,104 N</em>

Explanation:

<u>Force</u>

According to the second Newton's law, the net force exerted by an external agent on an object of mass m is:

F = ma

Where a is the acceleration of the object.

On the other hand, the equations of the Kinematics describe the motion of the object by the equation:

v_f=v_o+at

Where:

vf is the final speed

vo is the initial speed

a is the acceleration

t is the time

Solving for a:

\displaystyle a=\frac{v_f-v_o}{t}

We are given the initial speed as vo=20.4 m/s, the final speed as vf=0 (at rest), and the time taken to stop the car as t=7.4 s. The acceleration is:

\displaystyle a=\frac{0-20.4}{7.4}

a=-2.757\ m/s^2

The acceleration is negative because the car is braking (losing speed). Now compute the force exerted on the car of mass m=1,126 kg:

F = 1,126\ kg * 2.757\ m/s^2

F= 3,104 N

The force required is 3,104 N

6 0
2 years ago
Write 4,007,500,000 in scientific notation.
Vika [28.1K]
The answer is 4.0075 x 10^9

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