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arsen [322]
3 years ago
7

A rock is dropped at the same instant that a ball at the same height is thrown horizontally. which will will have the greater sp

eed when it reaches the ground? ball rock both will reach at the same time impossible to answer
Physics
1 answer:
Svetach [21]3 years ago
5 0
They will both hit the ground at the same time due to gravity.
that means they took the same time to travel the distance to the ground

however, the ball traveled farther
speed=distance (or displacement) divided by time
so the greater the distance, the greater the speed

the ball traveled faster in the same time so it traveled faster

answer is ball

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Suppose a piano tuner stretches a steel piano wire 7.5 mm. The wire was originally 0.975 mm in diameter, 1.45 m long, and has a
Tasya [4]

The forces a piano tuner applies to stretch the steel piano wire willl be 1.4 × 10¹¹ N.

<h3>What is force?</h3>

Force is defined as the push or pulls applied to the body. Sometimes it is used to change the shape, size, and direction of the body. Force is defined as the product of mass and acceleration. Its unit is Newton.

The application of a force may be used to describe the steel as an elastic element within a certain range of applied force.

Given data;

Young modulus, E=2.10 × 10¹¹ N/m²

Cross-sectional area,A

Final length,\rm L_f = 1.45 m = 1450 \ mm

Initial length,\rm L_i = 7.5 mm

\rm F  = \frac{(L_f-L_i)(E)(A)}{L_1} \\\\ \rm F  = \frac{(1450 - 7.5)(2.0 \times 0^{11})(0.746)}{1450} \\\\ F = 1.4 \times 10^{11} \ N

Hence, the force a piano tuner applies to stretch the steel piano wire willl be 1.4 × 10¹¹ N.

To learn more about the force refer to the link;

brainly.com/question/26115859

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8 0
2 years ago
Please help I would appreciate it
jek_recluse [69]

Answer:

3.176hours

Explanation:

270/85=3.126 hours DISTANCE / SPEED = TIME

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This column actually appears due to the body parts reflecting the light of the sun or moon to the observer.
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