Mechanical waves, it needs a certain medium to travel through. This medium can be a solid, liquid and gas. There are three types of mechanical waves namely, sound wave, water, and waves through the ropes.
A longitudinal wave is a wave that vibrates in a parallel direction with the motion. Also known as a compression wave. Both mechanical and longitudinal waves produce a sound.
So, the force that given when the wagon was being pulled is approximately <u>19.1 N (C)</u>.
<h3>Introduction</h3>
Hi ! For intermesso, this question will adopt a lot about the relationship of impulse to change in momentum. <u>Impulse is the total force applied in a certain time interval</u>. Impulses can cause a change of momentum, because momentum itself <u>is a mass that is affected by the velocity of an object</u>. We know that velocity is a vector quantity easy to change its direction. The relationship between impulse and change in momentum is formulated by :



With the following condition :
- I = impulse that given (N.s)
= change of momentum (kg.m/s)- F = force that given (N)
- m = mass of the object (kg)
- v = initial velocity (m/s)
- v' = final velocity (m/s)
= interval of the time (s)
<h3>Problem Solving</h3>
We know that :
- m = mass of the object = 25 kg
- v = initial velocity = 0 m/s
- v' = final velocity = 1.8 m/s
= interval of the time = 2.35 s
What was asked :
- F = force that given = ... N
Step by step :




<h3>Conclusion</h3>
So, the force that given when the wagon was being pulled is approximately 19.1 N (C).
Answer:
2A
Explanation:
The resistance of a wire can be defined as
R = ρL/A
Where,
ρ is Resistivity - the factor in the resistance which takes into account the nature of the material is the resistivity
L is Length of the conductor
A is Area of cross section of the conductor.
R₁/R₂ = (L₁/L₂) × (A₂/A₁) ----> rearranging it for A
A₂ = (R₁/R₂) × (L₂/L₁) × A₁
A₂ = (R/R) × (2L/L) × A
A₂ = 2A
Therefore, cross section area of another conductor must be 2A
Using a lever to move a rock reduces the force a person must exert . It also reduces the work (effort ) the person must do.
Using a lever decreases the input force required to lift up the load, for example if a force of 900N is required to lift the load without a lever . Using the lever the input force decreases to 500N and as we all know by the formulae of work done :
Work done ∝ force applied
By this equation we can conclude that if the force to be applied on the load reduces by the use of a lever therefore the work to be done on the load will also reduce .
You can get a additional information about the lever system below :
brainly.com/question/3522307
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