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
Arlecino [84]
3 years ago
15

What does it mean when work is positive?

Physics
1 answer:
Degger [83]3 years ago
7 0

Answer:

To have a positive job, the two vectors must have the same direction

Explanation:

Work is a scalar defined as the scalar product of two vectors, the froce and the displacement. To have a positive job, the two vectors must have  

collinear and that their arrows point in the same direction.

You can also appreciate this from the work equation

       W = F. r

bold indicate vector

      W = F  r cos θ

 

With θ the angle between force and displacement

You might be interested in
4. How long would it take for a water balloon to fall 39 m if we dropped it starting from rest down an
Paraphin [41]

Answer:

Around 2.8212 sec

Explanation:

Given the eqn x=1/2at^2+vot

your vo=0

39=1/2(-9.8)t^2

=7.95=t^2

=2.82sec

8 0
3 years ago
Say the tortoise and the hare are racing. If the tortoise moves straight
Rina8888 [55]

Explanation:

It's displacement would be negative

displacement is a vector quantity.

'Backwards', we can assume, would be negative.

and forwards, positive. So going backwards would mean a negative displacement.

5 0
3 years ago
Boxes A and B are being pulled to the right on a frictionless surface. Box A has a larger mass than B. How do the two tension fo
Vlad1618 [11]

Answer:

Tension T1 is less than tension T2.

T1 < T2

Explanation:

According to given data,

mass of box A ( mA) is grater than mass of box B (mB)

we can write,

m(A) > m(B)

Newton's second law states that:

Tension of object is directly proportional to the mass of the system.

T ∝ m

here Boxes A and B are being pulled to the right on a frictionless surface,

so Tension T1 generates due to the mass of box A m(A)

and Tension T2 arises due to mass of the system m(A) + m(B)

Thus tension T1 will be less than tension T2

T1 < T2

learn more about Tension force here:

<u>brainly.com/question/13175014</u>

<u />

#SPJ4

8 0
2 years ago
Caleb rides his motorcycle with a constant speed of 72km/h. How far can he Travel in 3 hours 40 minutes
lina2011 [118]
264 km

72 x 3 hr = 216 km
72/60 (min in an hr) =  1.2(km per min) x 40 = 48 km
216 + 48 = 264

5 0
3 years ago
A 10-cm-diameter circular loop of wire is placed in a 0.84-T magnetic field. Part A When the plane of the loop is perpendicular
Oksanka [162]

Answer:

When the plane of the loop is perpendicular to the field lines, the magnetic flux through the loop is  6.284 x 10⁻³ wb.

Explanation:

The magnetic flux through the loop is the product of magnetic field strength, circular area of the loop and angle of inclination.

Ф = BAcosθ

When the plane of the loop is perpendicular to the field lines, θ = 0

Ф = BAcos0

Ф = BA

Where;

Ф is the magnetic flux through the loop

B is the magnetic field strength = 0.8 T

A is the circular area of the loop;

A =\frac{\pi D^2}{4} = \frac{\pi *0.1^2}{4} = 0.007855 m^2

Ф = 0.8 x 0.007855 = 6.284 x 10⁻³ wb

Therefore, when the plane of the loop is perpendicular to the field lines, the magnetic flux through the loop is  6.284 x 10⁻³ wb.

5 0
3 years ago
Read 2 more answers
Other questions:
  • An 8kg soccer ball starts at rest and is kicked 31.5 meters until it reaches a final velocity of 21m/s in 3 seconds. Assuming th
    9·1 answer
  • Electromagnetic waves from the sun carry ___ to earth.
    9·1 answer
  • What is the initial position
    15·1 answer
  • What are three properties of electromagnetic waves?
    11·2 answers
  • A rocket moves away from the surface of earth. As the distance r from the center of the earth the planet increases, what happens
    5·1 answer
  • What is the mathematical expression for the electric ptential difference between points A and B when a charged particle is movin
    5·1 answer
  • 1. A 65 kg student, starting from rest, slides down an 16.2 m high water slide. On the way down, friction does 5700 J of work on
    13·1 answer
  • QUESTION 23
    9·1 answer
  • Consider a system consisting of an ideal gas confined within a container, one wall of which is a movable piston. Energy can be a
    11·1 answer
  • the specific brain mass is the brain mass divided by the body mass. if body mass increases, does the specific brain mass increas
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!