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valentinak56 [21]
3 years ago
6

lf an object's velocity changes from 25 meters per second to 15 meters per second in 2.0 seconds, the magnitude of the object's

acceleration is​
Physics
2 answers:
Mila [183]3 years ago
6 0

Answer:

-5 m/s^2

Explanation:

acceleration =  \frac{change \: in \: velocity}{time}  \\  \\  =  \frac{15 - 25}{2}  \\  \\  =  \frac{ - 10}{2}   \\  \\  =  -  5 \: m {s}^{ - 2}  \\  \\ negative \: sign \: represents \: that \:  \\ object \: is \: slowing \: down.

andreyandreev [35.5K]3 years ago
5 0

Explanation:

Acceleration is the change in velocity over time.

a = Δv / Δt

a = (15 m/s − 25 m/s) / 2.0 s

a = -5.0 m/s²

The magnitude of the acceleration is 5.0 m/s².

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Nezavi [6.7K]

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

100 = P - 20

P = 100 + 20 = 120  Kg.m/s

Therefore, the final momentum of a body is 120 Kg.m/s.

Learn more about momentum, here:

brainly.com/question/4956182

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5 0
1 year ago
Which undergoes the greatest change in momentum: (a) a baseball that is caught, (b) a baseball that is thrown, or (c) a baseball
Ksenya-84 [330]

Answer:

(c) a baseball that is caught and then thrown back

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4 years ago
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water

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fossil fuels

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Heat always flows from higher temperature to lower temperature. So option A. heat will flow from the air into the coolant is the correct answer.

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3 years ago
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