There are two types of mechanical waves:
longitudinal waves : Their displacement is in a direction perpendicular to the vibrations of the wave forming crests and troughs.
Transverse waves : They have the vibrations in the direction of the wave forming compressions and rarefactions.
Answer:
<em>50%</em>
Explanation:
Given
Initial power = 200W
Final power = 300W
Increment = 300 - 200 = 100W
percentage increase = increment/initial power * 100
percentage increase = 100/200 * 100%
percentage increase = 0.5 * 100
percentage increase = 50%
<em>Hence the percentage increase in speed is 50%</em>
I attached my work and highlighted my answers. Hope it makes sense! please comment back with any questions if anything is still unclear! :)
Explanation:
Mass of the crate, m = 68 kg
We need to find the resulting acceleration if :
(a) Force, P = 0
P = m a
⇒ a = 0
(b) P = 181 N
(c) P = 352 N
Hence, this is the required solution.
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Gravity is pushing you down on the earth while the friction from the ground is pushing you up. Those are the two frictions you must overcome when walking.
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