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
krek1111 [17]
3 years ago
10

In most circumstances, the normal force acting on an objectand

Physics
1 answer:
Lynna [10]3 years ago
4 0

Answer:

Normal Force is usually perpendicular to the movement and static friction usually means that there is no movement.

Explanation:

The work donde by any force on an object is equal to the displacement of the object multiplied by the component of the force that is in the direction of the displacement.

Normal force is usually perpendicular to the movement, so there is no component in the direction of the displacement. This is why it is zero in most circumstances.

<em>Static</em> friction on the other hand, usually means that there is no movement at all (it's static). It means that there is no displacement between the object and ground (in most cases). If there is no displacement, there is no work.

You might be interested in
What is the magnitude of δv12 if the bulb is removed from the socket (i.e. the circuit is not closed)?
andreev551 [17]

Since the circuit is incomplete or not closed, no current flows in the circuit. as per ohm's law , Voltage is directly proportional to current and is given as

V = Voltage = i R where i = current , R = resistance

as no current flows in the circuit, i = 0

the resistance R can not be zero. hence

V = 0 (R)

V = 0 Volts

so the magnitude of the Voltage is zero Volts

4 0
3 years ago
Read 2 more answers
A crane lifts an air conditioner to the top of a building. If the building is 12 m high, and the air conditioner has a mass of 2
andrey2020 [161]

Work needed = 23,520 J

<h3>Further explanation</h3>

Given

height = 12 m

mass = 200 kg

Required

work needed by the crane

Solution

Work is the transfer of energy caused by the force acting on a moving object  

Work is the product of force with the displacement of objects.  

Can be formulated  

W = F x d  

W = Work, J, Nm  

F = Force, N  

d = distance, m  

F = m x g

Input the value :

W = mgd

W = 200 kg x 9.8 m/s²x12 m

W = 23520 J

5 0
3 years ago
Straw polls are___. A. scientifically based B. representative samples C. biased sampling D. cluster samples
soldi70 [24.7K]
Straw polls are considered to be a form of biased sampling. An example of a straw poll is an unofficial vote like who you would like to be the President without actually casting your ballot.
8 0
3 years ago
What is the magnetic force on a proton that is moving at 4.5 107 m/s to the right through a magnetic field that is 1.6 T and poi
pickupchik [31]
The answer is letter C. 1.2 10^-11 N up
Solution:
F= Bqvsin(theta)
theta = sin 90 = 1
F= 1.4 T * 1.6x10^-19 * 5.2x10^7 ms^-1
F= 1.16 x 10^-11 N
Then the direction is upward.
6 0
3 years ago
Read 2 more answers
The amount of matter in an object is called its weight true or false
Deffense [45]

Answer:

true

Explanation:

logic

4 0
3 years ago
Read 2 more answers
Other questions:
  • A vertically polarized beam of light of intensity 100 W/m2 passes through two ideal polarizers. The transmission axis of the fir
    9·1 answer
  • A tree falls in a forest. How many years must pass before the 14C activity in 1.03 g of the tree's carbon drops to 1.02 decay pe
    14·1 answer
  • The energy of a wave depends on its ___________. <br> Fill in the blank.
    15·1 answer
  • Choose the answer that best completes this sentence: The moon may have contributed to the evolution of life from _____.
    6·1 answer
  • A stone is dropped from a cliff and falls 9.44 meters. What is the speed of the stone when it reaches the ground?
    5·1 answer
  • The electric field at the point x=5.00cm and y=0 points in the positive x direction with a magnitude of 10.0 N/C . At the point
    13·1 answer
  • A ceiling fan with 90-cm-diameter blades is turning at 64 rpm . Suppose the fan coasts to a stop 28 s after being turned off. Wh
    8·1 answer
  • A boy of mass, m weights 895 N. What is his mass, m?
    11·1 answer
  • show all work. a bus travels 100km/hr. it takes 6 hours to get from seattle to portland. how far away are the two cities?
    12·2 answers
  • A bobsled’s distance-time graph indicates that it traveled 120 m in 15 s. What is the bobsled’s average speed?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!