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3 years ago

What is the kinetic energy of an automobile with a mass of 1252 kg traveling at a speed of 12 m/s?

Physics

1 answer:

torisob [31]3 years ago

4 0

KE = 1/ 2 * 1252 * 144
as KE = 1/2 * m * v ^2
= 90144 J

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There are two possibilities for this question:
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4 years ago

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4 years ago

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3 years ago

Read 2 more answers

Use the following information for question 26 and 27. A 550-g ball traveling at 8.0 m/s undergoes a sudden head-on perfectly ela

Gnoma [55]

Answer:

The speed of 250 g ball after collision is 14 m/s.

Explanation:

mass of first ball, m = 550 g = 0.55 kg

initial velocity of first ball, u = 8 m/s

mass of second ball, m' = 250 g = 0.25 kg

initial velocity of second ball, u' = - 8 m/s

Let the speed of the balls is v and v' after the collision.

Use conservation of momentum

m u + m' u' = m v + m' v'

0.55 x 8 - 0.25 x 8 = 0.55 v + 0.25 v'

0.55 v + 0.25 v' = 2.4 ..... (1)

Use the formula of coefficient of restitution,

For elastic collision, e = 1

$e =\frac{v'-v}{u - u'}\\\\1 =\frac{v'-v}{8+8}\\\\16 =v' - v...... (2)$

By solving (1) and (2)

v = - 2 m/s and v' = 14 m/s

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3 years ago

Light from an argon laser strikes a diffraction grating that has 4,917 lines per cm. The first-order principal maxima are separa

miss Akunina [59]

Answer:

Wavelength is 4.8x10^-7m

Explanation:

See attached file

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3 years ago