What is the wavelength of an earthquake wave if it has a speed of 13 km/s and a frequency of 14 Hz?
2 answers:
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Answer:
1.08 m/s
Explanation:
This can be solved with two steps, first we need to find the time taken to fall 9.5 m, then we can divide the horizontal distance covered with time taken to calculate the velocity.
Time taken to fall 9.5 m
vertical acceleration = a = 9.8 m/s^2.
vertical velocity = 0, (since there is only horizontal component for velocity, )
distance traveled s = 9.5 m.
Substituting these values in the equation
⇒ t= 1.392 sec
Velocity needed
We know the time taken (1.392 s) to travel 1.5 m,
So velocity = 1.5 m / 1.392 s = 1.08 m/s
hence velocity of the diver must be at least 1.08 m/s
Answer:
Explanation:
Let the ball is thrown upwards with speed u and reaches upto height h.
Use III equation of motion
here, final velocity v = 0
So,
Now as the ball reaches the maximum height, it starts falling freely. Let it strkes with the ground with velocity v'.
here, u = 0
So,
It means the velocity is same as the velocity of projection.