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VashaNatasha [74]
2 years ago
5

An object starts from rest and uniformly accelerates at a rate of 1.25 m/s2 for 7.0 seconds.

Physics
1 answer:
stich3 [128]2 years ago
8 0

Explanation:

Since its accelerating, the velocity vs time graph is linear

For displacement we need initial velocity (which is zero because it starts from rest) and final velocity (which is calculatee thro acceleration formula

A= (vf - vi)/t

a= vf-0/t

1.25=vf / 7

1.25*7=vf

8.75 = vf

Now for displacement plug all the values in

X = 1/2(vf-vi)/t formula

The displacement (x) is 30.625 m

For part 3, we know new displacement that is 22m , the final and initial velocities are the same so just plug in the values for same formula above

The answer is t = 5.02

Im pretty sure all the answers are correct

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Read 2 more answers
the Earth exerts a gravitational force of 500 newtons on an object what is the mass of the object in kilograms
MAXImum [283]
Use Newton's second law F = mass * acceleration
In your problem F = 500, and we know gravity is working on it so use a = 9.81
Substitute into the equation
500 = m * 9.81
m = 50.97 kg
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3 years ago
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