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2 years ago

What are the two most important factors in determining if a force is doing physics work?

Physics

1 answer:

lorasvet [3.4K]2 years ago

8 0

The important factors in determining if a force is doing physics work include

1) The amount or magnitude of the force being applied

2) The displacement caused by the applied force

Hence,

Work = force x displacement

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A sound wave is moving through air. The wave has a wavelength of 0.65 m and a frequency of 512 Hz. Calculate the speed of the wa

nexus9112 [7]

Answer:

"332.8 m/s" is the right solution.

Explanation:

The given values are:

Wavelength,

$\lambda=0.65 \ m$

Frequency,

$f = 512 \ Hz$

As we know,

⇒ $Speed=Frequency\times Wavelength$

or,

⇒ $V=f\times \lambda$

By putting the given values in the above relation, we get

⇒ $=512\times 0.65$

⇒ $=332.8 \ m/s$

6 0

3 years ago

A crumb of bread, of mass 0.056 kg, is pulled upon by ants from rival anthills. They exert the following forces: 0.06 N to the n

Valentin [98]

Answer:

a) 1.855m/s^2, 9.71\° to the east-north

b) 0.103N, 9.46° to the west-south

Explanation:

To find the acceleration of the system you can assume that the forces are applied in a xy plane, where force toward north are directed in the +y direction, and forces to the east in the +x direction. BY taking into account the components of the acceleration for each axis you obtain the following systems of equations:

$0.06N-0.06Nsin(45\°)=ma_y\\\\0.08N-0.02N+0.06cos(45\°)=ma_x$

m: mass of the crumb of bread = 0.056kg

you simplify the equations an replace the values of the mass in order to obtain the acceleration components:

$a_y=\frac{0.017N}{0.056kg}=0.313\frac{m}{s^2}\\\\a_x=\frac{0.102N}{0.056kg}=1.829\frac{m}{s^2}$

$\theta=tan^{-1}(\frac{0.313}{1.829})=9.71\°\\\\a=\sqrt{a_x^2+a_y^2}=\sqrt{(1.829)^2+(0.313)^2}\frac{m}{s^2}=1.855\frac{m}{s^2}$

then, the acceleration of the system has a magnitude of 1.855m/s^2 and a direction of 9.71\° to the east-north

The fifth force must cancel both x an y components of the previous net force, that is:

$0.06N-0.06Nsin(45\°)+F_y=0\\\\F_y=-0.017N\\\\0.08N-0.02N+0.06cos(45\°)+F_x=0\\\\F_x=-0.102N\\\\\phi=tan^{-1}(\frac{-0.017}{-0.102N})=9.46\°$

$F=\sqrt{(0.102)^2+(0.017)^2}N=0.103N$

the, the force needed to reach the equilibrium has a magnitude of 0.103N and a direction of 9.46° to the west-south

4 0

3 years ago

List two ways of recording or measuring absolute time

enyata [817]

Answer:

Stop watch

Stop clock

Explanation:

Absolute time is time measured in definite periods such as minutes, days, and years. It can be measured uising stop watch or stop clock

7 0

3 years ago

Inside the repetitive "loop," assuming that we use the final velocity in each time interval as the approximation to the average

Mumz [18]

Answer:

A. Calculate vector

B. Update vector of each object

C. Update position of each object

Explanation:

Taking assumption of a system in which the forces are a function of the previous step's final position:

Firstly, we calculate the (vector) forces acting on the objects.

Secondly, Update the (vector) momentum of each object

(note: also update the velocity).

Thirdly, Update the (vector) position of each object.

The other operations are as follows;

i. select (dt),

ii. define mass,

iii. Put down constants,

iv. initialize variables, this would occur before the time-step loop is entered.

3 0

4 years ago

On his way to school, a student starts out walking quickly and then slows down as he gets closer to the school. Which graph best

Leni [432]

' A ' is the graph that shows it.

3 0

4 years ago

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