Resonance, Because its another way of saying sound waves. It determined the objects frequency.
Answer:
2.0 m
Explanation:
Energy is conserved.
Initial KE = Final PE + Work done by friction
½ mv² = mgh + Fd
½ mv² = mgh + mgμd
½ v² = gh + gμd
½ v² − gh = gμd
d = (½ v² − gh) / (gμ)
d = (½ (7.5 m/s)² − (10 m/s²) (2.1 m)) / ((10 m/s²) (0.35))
d = 2.0 m
Since the body is moving with uniform motion therefore the body doesn't accelerate
therefore acceleration is 0m/s^2
Answer:
D. increases by a factor of 4.
Explanation:
General equation of SHM
Lets taken the general equation of the displacement given as
x = A sinω t
A=Amplitude ,t=time ,ω=natural frequency
We know that speed V
V= A ω cosωt
The mechanical energy of spring mass system
K=Spring constant
Now when Amplitude A become 2 times then the mechanical energy will become 4 times.
Therefore the answer is D.
The given is a projectile motion with angle equal to 90° at which the motion would become horizontal. The projectile motion has two components for the distance. The horizontal component would progress at a constant rate each second while the vertical component would become greater as time progress.
In this item, we are asked to determine the amount of time that would be needed for the stone to hit the ground. This can be calculated through the equation,
d = V₀t + (1/2)(gt²)
It is to be noted that V₀ has a y-component equal to zero.
Substituting this value to the equation,
9.8 m = (0) + (1/2)(9.8 m/s²)(t²)
t = sqrt (2) = 1.41 s
Hence, the time would be equal to 1.41 s.
