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klio [65]
3 years ago
9

Help me please!!!!!..............

Physics
1 answer:
qaws [65]3 years ago
6 0

Answer:

<em>The car took 3 hours to travel 180 miles</em>

Explanation:

<u>Constant Speed Motion</u>

An object travels at constant speed if the ratio of the distance traveled by the time taken is constant.

Expressed in a simple equation, we have:

\displaystyle v=\frac{d}{t}

Where  

v = Speed of the object

d = Distance traveled

t = Time taken to travel d.

From the equation above, we can solve for t:

\displaystyle t=\frac{d}{v}

The car travels at v=60 mi/h for a distance of d=180 miles. The time taken is:

\displaystyle t=\frac{180\ mi}{60\ mi/h}

t = 3 hours

The car took 3 hours to travel 180 miles

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The final momentum of the body is equal to 120 Kg.m/s.

<h3>What is momentum?</h3>

Momentum can be described as the multiplication of the mass and velocity of an object. Momentum is a vector quantity as it carries magnitude and direction.

If m is an object's mass and v is its velocity then the object's momentum p is: {\displaystyle \mathbf {p} =m\mathbf {v} . The S.I. unit of measurement of momentum is kg⋅m/s, which is equivalent to the N.s.

Given the initial momentum of the body = Pi = 20 Kg.m/s

The force acting on the body, Pf = 25 N

The time, Δt = 4-0 = 4s

The Force is equal to the change in momentum: F ×Δt = ΔP

25 × 4 = P - 20

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P = 100 + 20 = 120  Kg.m/s

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1 year ago
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RoseWind [281]
D) decreasing the temperature lowers the average kinetic energy of the reactants.
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3 years ago
PLEASE HELP ASAP!!! CORRECT ANSWERS ONLY PLEASE!!! A IS NOT THE CORRECT ANSWER
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Answer: A

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