3 years ago

A member of the cross country team is training for the big race. She runs 7.85 km one afternoon. How many miles is this?

Physics

1 answer:

allsm [11]3 years ago

8 0

Answer:

4.88 miles

Explanation:

7.85km * (.621miles/km) = 4.88 miles

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If the force applied to an object is not greater than the starting friction, what will happen to the object?

bonufazy [111]

Answer:

Explanation:

the object will not move as the force exerted is not sufficient enough to overcome its force of friction

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3 years ago

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20. Consider a model steel bridge that is 1/100 the exact scale of the real bridge that is to be built. a. If the model bridge w

Veseljchak [2.6K]

The model bridge captures all the structural attributes of the real bridge, at a reduced scale.

Part a.
Note that volume is proportional to the cube of length. Therefore the actual bridge will have 100^3 = 10^6 times the mass of the model bridge.

Because the model bridge weighs 50 N, the real bridge weighs
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Part b.
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Therefore the real bridge will not sag either.

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3 years ago

An acorn falls from a tree and hits the ground in 0.8 s. How far did the acorn fall . Use g = 9.8 m/s^2. Round your final result

mylen [45]

The distance covered by the acorn is 3.136 m.

<u>Explanation:</u>

The time taken for the acorn to hit the ground is 0.8 s. As it is a free fall, the acorn will be completely under the influence of gravity. So the acceleration will be acceleration due to gravity.

Then using the second law of equation,

$s=ut+\frac{1}{2}gt^{2}$