This is how far I got:
put equation 3. into 1. together with h = 5:
4.
when I double m₁ the ratio becomes:
5.
when I put these to ratios back into equation nr 1 and nr2, I find the ratio:
and new v₁ = 2.95
I'm not sure this is correct.
When more than one force acts upon an object, the vector sum of these forces is the resultant force. When the resultant force on an object is zero, it will remain at rest if it is at rest, or continue to move in a straight line at a constant velocity if it is in motion. ... That is, there is zero acceleration.
Constructive interference occurs when two waves overlap and the resulting wave has a larger amplitude. Hence, option (2) is correct.
What is interference?
The phenomenon in which there is an overlapping between the two waves propagating in a medium is known as interference. The interference is classified into two categories namely,
- Constructive interference
- Destructive interference
Constructive interference -
It occurs when there is a superposition of the two waves such that the resulting wave has a large amplitude.
Destructive interference -
It occurs when there is a superposition of the two waves such that the resulting wave has a lower amplitude.
Thus, we can conclude that constructive interference occurs when two waves overlap and the resulting wave has a larger amplitude. Hence, option (2) is correct.
Learn more about the interference here:
brainly.com/question/16098226
Answer:
Explanation:
A mass of 700 kg will exert a force of
700 x 9.8
= 6860 N.
Amount of compression x = 4 cm
= 4 x 10⁻² m
Force constant K = force of compression / compression
= 6860 / 4 x 10⁻²
= 1715 x 10² Nm⁻¹.
Let us take compression of r at any moment
Restoring force by spring
= k r
Force required to compress = kr
Let it is compressed by small length dr during which force will remain constant.
Work done
dW = Force x displacement
= -kr -dr
= kr dr
Work done to compress by length d
for it r ranges from 0 to -d
Integrating on both sides
W =
= [ kr²/2]₀^-4
= 1/2 kX16X10⁻⁴
= .5 x 1715 x 10² x 16 x 10⁻⁴
= 137.20 J