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3 years ago

_ acceleration occurs when an object speeds up. Answer Positive

Physics

2 answers:

Nina [5.8K]3 years ago

6 0

_ acceleration occurs when an object speeds up.

Answer

Positive

nydimaria [60]3 years ago

5 0

That statement is a lot like saying "A baby has two legs when it's a boy.". The statement is true as far as it goes, but it doesn't go all the way.

Yes, speeding up is one kind of acceleration, but it's not the ONLY kind. Slowing down and turning are also acceleration.

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What is the magnitude of the applied electric field inside an aluminum wire of radius 1.2 mm that carries a 3.0-a current? [ σal

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3 years ago

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3 years ago

An 1100-kg car traveling at 27.0 m/s starts to slow down and comes to a complete stop in 578 m. What is the magnitude of the ave

Trava [24]

Answer:

693.685 N

Explanation:

t = Time taken

u = Initial velocity = 27 m/s

v = Final velocity

s = Displacement = 578 m

a = Acceleration

m = Mass

Equation of motion

$v^2-u^2=2as\\\Rightarrow a=\frac{v^2-u^2}{2s}\\\Rightarrow a=\frac{0^2-27^2}{2\times 578}\\\Rightarrow a=-0.63062\ m/s^2$

Force

F = ma

$F=1100\times -0.63062\\\Rightarrow F=-693.6851\ N$

Magnitude of braking force required to stop the car is 693.685 N

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3 years ago