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
san4es73 [151]
3 years ago
11

Give an example of a situation in which there is a force and a displacement, but the force does no work. explain why it does no

work
Physics
2 answers:
makkiz [27]3 years ago
6 0
Work is equal to force times distance times cosine of the angle between the force and the path vector making it a scalar or dot product. Work is independent of the path taken. It refers to positive change in KE or negative change in PE.
 So for example if you lift a box from ground to waist height then, you did positive work over the distance you lifted it. If you pick it up to that same height, then put it back done on the ground at same place, then no work is done. 

Hope this makes sense. Any questions please ask. Thank You!
harkovskaia [24]3 years ago
6 0
Say you have an object such as a block on a flat surface with no friction to resist it while being displaced. The block moves but no work is done.
You might be interested in
Which situation would result in interference?
Arturiano [62]

Answer:

Answer is a wave increasing in energy as it hits another wave.

Explanation:

I hope it's helpful!

5 0
3 years ago
Read 2 more answers
Trong thí nghiệm về giao thoa sóng trên mặt nước gồm hai nguồn kết hợp S1S2 cách nhau 15 cm với dao động với tần số 30Hz. Tốc độ
mojhsa [17]

Answer:

this is a difficult question but I will try to answer it answer for this is 3220 a + b b u s y d l new

6 0
3 years ago
This ball is technology too! It can be<br> rolled, kicked, or thrown. Is that a need<br> or a want?
Inga [223]

Answer:

want

Explanation:

people always want the new thing especially if its technology

7 0
3 years ago
Read 2 more answers
A firecracker in a coconut blows the coconut into three pieces. two pieces of equal mass fly off south and west, perpendicular t
netineya [11]
Here we have mass that moves at ceratin speed. This means that we have momentum. The law that must be observed is law of conservation of momentum. It states that momentum before certain event is equal to a momentum after that event. Here we have three masses so we can write this as:
m_{1}  v_{1i} + m_{2}  v_{2i} + m_{3}  v_{3i} = m_{1}  v_{1f} + m_{2}  v_{2f} + m_{3}  v_{3f}
Before the firecracker blows a coconut does not move, so left side is equal to 0:
0 = m_{1} v_{1f} + m_{2} v_{2f} + m_{3} v_{3f}

We know that m1=m2=m and m3=2m. Also we are asked to find v3f so we can rewrite formula:
v_{3f} = -  \frac{m_{1}  v_{1f}  + m_{2} v_{2f} }{ m_{3} }

We must take in consideration that two parts with same mass do not move in same direction. The center of mass of these two parts moves between them at angle of 45° with respect to both south and west. The speed of a center of mass is:
v_{f} = \sqrt{ v_{1f}^{2}+ v_{2f}^{2} } \\ \\ v_{f} = 33.9m/s
This speed we can insert into formula for v3f:
v_{3f} = - \frac{m*33.9+m*33.9 }{ 2m } \\  \\ v_{3f} = - \frac{2m*33.9 }{ 2m }  \\  \\ v_{3f} = - 33.9m/s

We can see that part of a coconut with biggest mass has same speed as center of mass of two other parts. Negative sign shows that direction is opposite to direction of two pats. Biggest part moves towards north-east.
8 0
3 years ago
Read 2 more answers
The basic unit of electric current is the
xxMikexx [17]

The ampere (A) is a basic SI unit consisting of the amount of electric charge or number of electrons that pass a point in a electrical circuit in one second. The volt (V) is the electrical potential causing electrons to move through a wire. It is a joule of energy per coulomb of charge.

5 0
3 years ago
Other questions:
  • PLEASE ANSWER!!!!!
    13·1 answer
  • All ions are atoms with a
    15·1 answer
  • Kent needs to know the volume of a sphere. When he measures the radius, he gets 135.4 m with an uncertainty of +4.6 cm. What's t
    15·1 answer
  • Renewable energy energy is an important alternate source of energy. Why?
    12·1 answer
  • A physics student shoves a 0.50-kg block from the bottom of a frictionless 30.0° inclined plane. The student performs 4.0 j of w
    8·1 answer
  • Is the Florida scrub a forest or grassland
    10·1 answer
  • An electron traveling with a speed v enters a uniform magnetic field directed perpendicular to its path. The electron travels fo
    10·1 answer
  • The difference between a molecule and a compound is that a compound is made up of atoms from . A chemical change creates a new .
    6·2 answers
  • A positive test charge of 8.5 × 10 negative 7 Columbus experiences a force of 4.1 × 10 negative 1 N calculate the electric field
    14·1 answer
  • Can someone help with just question 1 :)
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!