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3 years ago

If two identical cars are traveling at different velocities, which car has the greatest momentum

Physics

1 answer:

vodomira [7]3 years ago

8 0

Answer:

The one with highest velocity

Explanation:

The momentum of an object is given by

$p=mv$

where

m is the mass of the car

v is the velocity of the car

In this problem, we have two identical cars: identical means they have same mass, so

$m_1 = m_2 = m$

The momentum of car 1 is

$p_1 = mv_1$

while the momentum of car 2 is

$p_2 = mv_2$

By comparing the two expressions, we see that the car with greatest momentum is the one with highest velocity, since the mass is the same.

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A flat sheet of ice has a thickness of 1.4 cm. It is on top of a flat sheet of crown glass that has a thickness of 3.0 cm. Light

MAXImum [283]

Answer:

t = 2.13 10-10 s , d = 6.39 cm

Explanation:

For this exercise we use the definition of refractive index

n = c / v

Where n is the refraction index, c the speed of light and v the speed in the material medium.

The refractive indices of ice and crown glass are 1.13 and 1.52, respectively, therefore the speed of the beam in the material medium is

v = c / n

As the beam strikes perpendicularly, the beam path is equal to the distance of the leaves, there is no refraction, so we can use the uniform motion relationships

v = d / t

t = d / v

t = d n / c

Let's look for the times on each sheet

Ice

t₁ = 1.4 10⁻² 1.31 / 3 10⁸

t₁ = 0.6113 10⁻¹⁰ s

Crown glass (BK7)

t₂ = 3.0 10⁻² 1.52 / 3.0 10⁸

t₂ = 1.52 10⁻¹⁰ s

Time is a scalar therefore it is additive

t = t₁ + t₂

t = (0.6113 + 1.52) 10⁻¹⁰

t = 2.13 10-10 s

The distance traveled by this time in a vacuum would be

d = c t

d = 3 10⁸ 2.13 10⁻¹⁰

d = 6.39 10⁻² m

d = 6.39 cm

3 0

3 years ago

The chances of being involved in a fatal crash is higher at night then during the day

Ierofanga [76]

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3 years ago

A 600 kg car is at test and then accelerated to 5m/s , what is its original kinetic energy

ycow [4]

Answer:

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Explanation:

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KE = 1/2 m v²

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2 years ago

If two identical cars are traveling at different velocities, which car has the greatest momentum ​

If two identical cars are traveling at different velocities, which car has the greatest momentum