Answer:
a) Linear equation
Explanation:
Definition of acceleration
if a=constant and we integrate the last equation
So the relation between the time and the velocity is linear. If we plot the velocity in function of time, the plot is a line, and the acceleration is the slope of this line.
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,
Initial length,
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;
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According to the law of universal gravitation, which is a classical physical law that describes the gravitational interaction between different bodies with mass:
Where:
is the module of the force exerted between both bodies
is the universal gravitation constant.
and
are the masses of both bodies.
is the distance between both bodies
In this case we have a gravitation force , given by the formula written at the beginning. Let’s rename the distance
as
:
(1)
And we are asked to find the gravitation force with a given distance of
:
(2)
The gravity constant is the same for both equations, and we are assuming both masses are constants, as well. So, let’s isolate in both equations:
From (1):
(3)
From (2):
(4)
If (3)=(4):
(5)
Now we have to find :
(6)
If :
>>>>This is the new force of attraction