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Nikolay [14]
3 years ago
9

A car accelerates from rest to 34 m/s in just 12 seconds. what is is acceleration?

Physics
2 answers:
USPshnik [31]3 years ago
8 0
Acceleration=(final velocity-initial velocity)/time
therefore
(34-0)/12
=2.83m/s
Svetach [21]3 years ago
5 0
Hey!

u= 0 m/s
v=34m/s
t=12s
a=?

Using the first equation of motion,

v-u=at
34-0=a×12
34=12a
34/12=a
a=2.83 m/s^2


Hope it helps...!!!
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Answer:

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As we know from the conservation of mass, the rate at which any amount of fluid mass (m_{1}) is entering in a system is equal to the rate at which the same amount of fluid mass (m_{2}) is leaving the system.

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Now, according to the problem, as the density of the fluid does not change, we can write

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where A_{1} and A_{2} are the cross-sectional areas through which the fluid is passing and v_{1} and v_{2} are the velocities of the fluid through the respective cross-sectional areas.

As according to the problem, A_{2} > A_{1}, so from the above formula v_{2} < v_{1}.

Also we know that fluid pressure is created by the motion of the fluid through any area. When the fluid gains speed, some of its energy is used to move faster in the fluid’s direction of motion. It causes in a lower pressure.

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