A water-skier is moving at a speed of 12.0 m/s . When she skis in the same direction as a traveling wave, she springs upward eve
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To solve this problem we will apply the concepts related to energy conservation. With this we will find the speed before the impact. Through the kinematic equations of linear motion we will find the velocity after the impact.
Since the momentum is given as the product between mass and velocity difference, we will proceed with the velocities found to calculate it.
Part A) Conservation of the energy
Part B) Kinematic equation of linear motion,
Here
v= 0 Because at 1.5m reaches highest point, so v=0
Therefore the velocity after the collision with the floor is 3.7m/s
PART C) Total change of impulse is given as,
(a) is the wavelength in air of such a sound wave.
(b) is the wavelength of this wave in tissue.
<u>Explanation:</u>
Frequency and wavelength can be related by the equation,
Velocity = Wavelength x Frequency
where,
v - velocity of light for all EM (electromagnetic) waves in vacuum
Given:
f - 4.50 MHz =
a) To find the wavelength in air
We know,
Speed of sound in air = 343 m/s
Apply given frequency and speed of sound in air, we get
b) If the speed of sound in tissue is 1500 m/s, find the wavelength of this wave in tissue
Speed of sound in tissue, v = 1500 m/s