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3 years ago

Which one of these graph pairs represent the SAME motion?

Physics

1 answer:

zhenek [66]3 years ago

7 0

Answer: D is the correct answer

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A spring scale hung from the ceiling stretches by 5.6 cm when a 2.0 kg mass is hung from it. the 2.0 kg mass is removed and repl

k0ka [10]

When the mass of 2.0 kg is attached to the spring, the force applied to the spring is the weight of the mass, so
$F_1 = m_1 g =(2.0 kg)(9.81 m/s^2)=19.62 N$
This force stretches the spring by $\Delta x_1 = 5.6 cm=0.056 m$ , so we can use Hook's law to find the spring constant:
$k= \frac{F_1}{\Delta x_1}= \frac{19.62 N}{0.056 m}=350.4 N/m$

Then the mass of 2.0 kg is removed and replaced with another mass m2=2.7 kg. The force produced by this mass is equal to its weight:
$F_2 = m_2 g =(2.7 kg)(9.81 m/s^2)=26.5 N$
And so, we can use again Hook's law to calculate the new stretch of the spring:
$x_2= \frac{F_2}{k}= \frac{26.5 N}{350.4 N/m}=0.076 m=7.6 cm$

3 0

3 years ago

What kind of research in teaching of physical science can be done???

11Alexandr11 [23.1K]

Answer:

Physical sciences are those academic disciplines that aim to uncover the underlying laws of nature - often written in the language of mathematics. It is a collective term for areas of study including astronomy, chemistry, materials science and physics.

Explanation:

3 0

3 years ago

A person stands 35.0 m from a flag pole. With a protractor at eye level, he finds that the angle to the top of the flag pole is

Phoenix [80]

Answer:

The flag is 16.321 meters high.

Explanation:

The situation is represented in the attached figure

In the figure we have

$tan(\theta )=\frac{H}{D}$

Given that

θ = 25.0 degrees

D = 35.0 meters

Applying values in the above equation we have

$tan(25)=\frac{H}{35.0}\\\\\therefore H=35.0\times tan(25^{o})=16.321meters$

6 0

4 years ago

A moving object always has energy in its?

Flura [38]

Answer:

Explanation:

Kinetic and potential energies are found in all objects. If an object is moving, it is said to have kinetic energy (KE). Potential energy (PE) is energy that is "stored" because of the position and/or arrangement of the object.

7 0

3 years ago

If you had a mass of 44 g and a volume of 40.5ml what is the density

klio [65]

Here, We know, Density = Mass / Volume
Here, mass = 44 g
volume = 40.5 ml = 40.5 cm³

Substitute their values,
d = 44 / 40.5
d = 1.086 g/cm³

In short, Your Answer would be 1.086 g/cm³

Hope this helps!

4 0

3 years ago