1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
igor_vitrenko [27]
3 years ago
10

Which of the following is a true statement about work?

Physics
1 answer:
Over [174]3 years ago
5 0

Answer:

It measure the effort it takes for an object to move

Explanation:

Work done is the force applied to move a body through a particular distance.

It can also to be said to be a measure of the effort it takes for an object to move.

The unit of work done is in Joules.

 To find work done, we use the expression below:

       Work done  = Force x distance

You might be interested in
If the timber weighs 670 N, calculate its angle of inclination when the water surface is 2.1 m above the pivot. Above what depth
Ymorist [56]

Answer:

Q = 40.1 degrees

Explanation:

Given:

- The weight of the timber W = 670 N

- Water surface level from pivot y = 2.1 m

- The specific density of water Y = 9810 N / m^3

- Dimension of timber = (0.15 x 0.15 x 0.0036) m

Find:

- The angle of inclination Q that the timber makes with the horizontal.

Solution:

- Calculate the Flamboyant Force F_b acting upwards at a distance x along the timber, which is unknown:

                                   F_b = Y * V_timber

                                   F_b = 9810*0.15*0.15*x

                                   F_b = 226.7*x N

- Take static equilibrium conditions for the timber, and take moments about the pivot:

                                   (M)_p = 0

                                   W*0.5*3.6*cos(Q) - x/2 * F_b*cos(Q) = 0

- Plug values in:

                                   670*0.5*3.6 - x^2 * 0.5*226.7 = 0

                                   x^2 = 1206 / 113.35

                                   x = 3.26 m

- Now use the value of x and vertical height y to compute the angle of inclination to be:

                                   sin(Q) = y / x

                                   sin(Q) = 2.1 / 3.26

                                   Q = sin^-1 (0.6441718)

                                   Q = 40.1 degrees

5 0
3 years ago
A phonograph record 0.15 m in its radius rotates 18 times per 90 seconds what is the frequency?
ioda

Answer:

The frequency of the phonograph record is 0.2 Hz

Explanation:

The frequency of an object moving in uniform circular motion is the number of completed cycles the object makes in a specified time period

The given parameters of the phonograph record are;

The radius of the record = 0.15 m

The number of times the phonograph record rotates, n = 18 times

The time it takes the phonograph record to rotate the 18 times, t = 90 seconds

The frequency of the phonograph record, f = (The number of times the phonograph record rotates) ÷ (The time it takes the phonograph record to rotate the 18 times)

∴ The frequency of the phonograph record, f = n/t = 18/(90 s) = 0.2 Hz

The frequency of the phonograph record = 0.2 Hz.

6 0
2 years ago
Which of the following is NOT an example of a correct interaction between the
makkiz [27]

Answer:

WE NEED ANSWER CHOICES

Explanation:

3 0
3 years ago
The law of reflection says that the angle of incidence is
nekit [7.7K]
The law of reflection states that the angle of incidence is equal to the angle of reflection. Furthermore, the law of reflection states that the incident ray, the reflected ray and the normal all lie in the same plane.

hope this helps :)

4 0
3 years ago
How tilted is the axis of the earth's rotation as compared to the plane of the earth's orbit?
Phantasy [73]
C. 23.5 degrees
This tilt in the axis causes the seasons. 
Hope this helps.
6 0
3 years ago
Read 2 more answers
Other questions:
  • A. Compare solids, liquids, and gases in terms of the way their volumes change (or don't change) when placed into different cont
    13·1 answer
  • The addition of heat Q causes a metal object to increase in temperature from 4°C to 6°C . What is the amount of heat necessary t
    9·2 answers
  • Find the frequency of light emitted in the transition from the 148th orbit to the 139th orbit. Find the frequency of light absor
    10·1 answer
  • Answer please 98 points also brainliest
    12·2 answers
  • If a water wave vibrates up and down three times each second and the distance between wave crests is 2 meters, what are:
    15·2 answers
  • Identify the magnetic north pole of Earth’s magnet?
    6·2 answers
  • Describe the effect of the mass on the net force.
    13·2 answers
  • Why was Earth very hot at the beginning of its formation? Select all that apply.
    9·1 answer
  • the electromagnet shown in the image has a wire coiled 5 times around a nai. it can lift up to 7 metal paper clips. What two cha
    13·2 answers
  • The relative density of ice is 0.92 what fraction of the volume of a piece of ice will be submerged when floating in a liquid of
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!