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Mekhanik [1.2K]
3 years ago
12

An object moving at a constant velocity accelerates at a constant rate of 2.5 m/s2 for a distance of 30 m. At the end of the acc

eleration the object has a velocity of 90 m/s. What was its velocity before accelerating?
Physics
1 answer:
nydimaria [60]2 years ago
5 0

Answer:

The initial velocity is 89.16m/s

Attached is the solution

Explanation:

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Find the instantaneous acceleration at t=ls for an object moving along a straight axis with velocity function:
Maru [420]
The answer is A.
Explanation:
We know that the average acceleration a for an interval of time Δt is expressed as:

a = Δv
Δt
where Δv is the change in velocity that occurs during Δt.
e formula for the instantaneous acceleration a is almost the same, except that we need to indicate that we're interested in knowing what the ratio of Δv to Δt approaches as Δt approaches zero.

We can indicate that by using the limit notation.

So, the formula for the instantaneous acceleration is:

a = lim Δv
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3 years ago
a net force of 219 N is exterted on a rock. the rock has an acceleration of 3m/s^2 due to this force. what is the mass of the ro
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Answer:

<h2>73 kg</h2>

Explanation:

The mass of the object can be found by using the formula

m =  \frac{f}{a}  \\

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a is the acceleration

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m =  \frac{219}{3}  \\

We have the final answer as

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