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
dezoksy [38]
3 years ago
9

What is WgWgW_g, the work done on the block by the force of gravity as the block moves a distance LLL up the incline? Express th

e work done by gravity in terms of the weight www and any other quantities given in the problem introduction
Physics
1 answer:
Llana [10]3 years ago
5 0

Answer:

-mgLsin\theta

Explanation:

We are given that

Applied force=F

Angle=\theta

Distance=L

We have to find the work done by the force  due to gravity.

g=9.8 m/s^2

Work done=mgsin\theta Lcos180^{\circ}+mgcos\theta Lcos90

W_g=-mgsin\theta L+mgLcos\theta\times 0

Where cos180^{\circ}=-1

cos90^{\circ}=0

W_g=-mgLsin\theta

Hence, the work done on the block by the force of gravity as the block moves a distance L up the incline=-mgLsin\theta

You might be interested in
Energy is transferred by the process of convection from the hot water at the bottom of the tank to the cooler water at the top.
iragen [17]
The transfer of energy means, in convention process, transport of matter. In this case, hot water has lower density than cool water. The water with less density ascends and leaves gaps that are occupied with cooler water "packages".
7 0
3 years ago
An electron is moving east in a uniform electric field of 1.55 N/C directed to the west. At point A, the velocity of the electro
valkas [14]

Answer:

Final velocity of electron, v=6.45\times 10^5\ m/s    

Explanation:

It is given that,

Electric field, E = 1.55 N/C

Initial velocity at point A, u=4.52\times 10^5\ m/s

We need to find the speed of the electron when it reaches point B which is a distance of 0.395 m east of point A. It can be calculated using third equation of motion as :

v^2=u^2+2as........(1)

a is the acceleration, a=\dfrac{F}{m}

We know that electric force, F = qE

a=\dfrac{qE}{m}

Use above equation in equation (1) as:

v^2=u^2+\dfrac{2qEs}{m}

v^2=(4.52\times 10^5\ m/s)^2+2\times \dfrac{1.6\times 10^{-19}\ C\times 1.55\ N/C}{9.1\times 10^{-31}\ kg}\times 0.395\ m

v = 647302.09 m/s

or

v=6.45\times 10^5\ m/s

So, the final velocity of the electron when it reaches point B is 6.45\times 10^5\ m/s. Hence, this is the required solution.

3 0
3 years ago
State the law of conversation of energy in your own words. Give an example of a situation that you have either encountered or kn
RSB [31]
That Energy Cannot Be Created Nor Destroyed
4 0
3 years ago
Most oxygen in our atmosphere _____. has a single oxygen atom combines with carbon has two oxygen atoms has three oxygen atoms
andrew-mc [135]

Answer:

Two oxygen atoms

Explanation:

The majority of the oxygen in the air in our atmosphere consists of molecular oxygen (O_2), which consists of 2 atoms of oxygen, since free oxygen mainly form covalent bonds with other atoms of oxygen.

A small fraction of the oxygen, however, in the ozone form, which consists of 3 atoms of oxygen bond together (O_3).

5 0
3 years ago
An inelastic collision of two objects is characterized by the following.
serious [3.7K]

Options:

(a) Total kinetic energy of the system remains constant.

(b) Total momentum of the system is conserved.

(c) Both A and B are true.

(d) Neither A nor B are true.

Answer:

(b) Total momentum of the system is conserved.

Explanation:

An inelastic collision is a type of collision in which momentum is conserved and kinetic energy is not conserved. That is, there is loss of kinetic energy.

In an inelastic collision:

Total momentum before collision = Total momentum after collision

An example of inelastic collision is seen in the ballistic pendulum, The ballistic pendulum is a device in which a projectile such as a bullet is fired into a suspended heavy wooden stationary block.

8 0
3 years ago
Other questions:
  • Assume that the amplifiers on the stage operate at a combined power of 5,000 Watts, and that 80% of this is converted to sound.
    9·1 answer
  • Ground water erosion can result in the formation of stalactite and stalagmite in caves.true or false
    9·2 answers
  • An ideal spring hangs from the ceiling. A 2.15 kg mass is hung from the spring, stretching the spring a distance d = 0.0895 m fr
    12·1 answer
  • 2. A 3.45-kg centrifuge takes 100 s to spin up from rest to its final angular speed with constant angular acceleration. A point
    10·2 answers
  • Calculate the volume of a 5-g sample of pure gold
    12·1 answer
  • A hollow sphere of inner radius 8.82 cm and outer radius 9.91 cm floats half-submerged in a liquid of density 948.00 kg/m^3. (a)
    11·1 answer
  • What difficulty will you encounter if you only have data from two recording station?
    5·2 answers
  • 3. The soccer kicker kicks a 2 kg football with a force of 68 N. How fast will the ball accelerate down the field?
    6·1 answer
  • Why is the sky blue?
    15·2 answers
  • Two very narrow slits are spaced 1.80 mm apart and are placed 35.0 cm from a screen. What is the distance between the first and
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!