3 years ago

Unlike acceleration and velocity, speed is NOT a quantity that accounts for..

Physics

2 answers:

Alina [70]3 years ago

6 0

Answer:

Explanation:

direction is literally the only difference between speed and velocity

RoseWind [281]3 years ago

4 0

Answer:

Direction

Explanation:

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2 years ago

Suppose a moving car has 2000 J of kinetic energy. If the carʹs speed doubles, how much kinetic energy would it then have?

Bond [772]

Answer:

option A

Explanation:

given,

Kinetic energy of the car = 2000 J

speed of the car is doubled

we know,

$KE_1 = \dfrac{1}{2}mv^2$

$2000= \dfrac{1}{2}mv^2$ ........(1)

now, speed of the car is doubled

v' = 2 v

$KE_2 = \dfrac{1}{2}mv'^2$

$KE_2 = \dfrac{1}{2}m(2v)^2$

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$KE_2 = 4\times \dfrac{1}{2}m(v)^2$

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$KE_2 = 8000\ J$

Hence, the Kinetic energy would be equal to 8000 J.

The correct answer is option A.

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2 years ago