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Naddika [18.5K]
4 years ago
10

Police are investigating an accident. They know that Tom Brady was driving 20 m/s before being hit by Jay Z head on. Tom Brady’s

car has a mass of 1100 kg and Jay Z’s has a mass of 1475 kg. They also know that the two cars stuck together and were traveling 7 m/s in the same direction as Jay Z was driving. The speed limit was 25 m/s, was Jay Z speeding?
Please show work
Physics
1 answer:
Katarina [22]4 years ago
5 0

Answer:

Yes

Explanation:

Momentum before collision = momentum after collision

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

The cars stick together after the collision, so they have the same final velocity.

m₁u₁ + m₂u₂ = m₁v + m₂v

m₁u₁ + m₂u₂ = (m₁ + m₂)v

Plug in values and solve (take Jay Z's direction to be positive):

(1100) (-20) + (1475) u₂ = (1100 + 1475) (7)

u₂ = 27.1 m/s

Yes, Jay Z was speeding.

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a car whose mass is 1000kg is traveling at a constant speed of 10m/s. Neglecting any friction how much force will the engine hav
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This next statement is a big deal.  It should be up on a board, surrounded
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The answer to the question is:  On a level road, and neglecting any friction,
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7 0
3 years ago
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Help please I will mark you the brainly!
Fudgin [204]

D)

Explanation:

Coz the position changes with time but the position change is not constant throughout time So, D) does not have constant velocity

3 0
3 years ago
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Question 1 (1 point)
KATRIN_1 [288]
Pretty sure it is weather :))
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3 years ago
A substance has a half-life of 10,000 years and an initial mass of 1,000 grams. How many years will pass before only 250 grams o
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<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ After 10,000 years the mass will be:

1,000 / 2 = 500

After 20,000 years the mass will be:

500/2 = 250

As you can see, the correct answer would be A. 20,000 years

<h3><u>✽</u></h3>

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

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