To solve this problem we will apply the concepts related to the Doppler effect. According to this concept, it is understood as the increase or decrease of the frequency of a sound wave when the source that produces it and the person who captures it move away from each other or approach each other. Mathematically this can be described as
Here,
= Original frequency
= Velocity of the observer
= Velocity of the speed
Our values are,
Using the previous equation,
Rearrange to find the velocity of the observer
Replacing we have that
Therefore the velocity of the observer is 16.2m/s
Answer:
<em>The</em><em> </em><em>net</em><em> </em><em>force</em><em> </em><em>on</em><em> </em><em>the</em><em> </em><em>hockey</em><em> </em><em>puck</em><em> </em><em>is</em><em> </em><em>zero</em><em> </em><em>because</em><em> </em><em>it's </em><em>acceleration</em><em> </em><em>is</em><em> </em><em>zero</em><em> </em><em>due to </em><em>constant</em><em> </em><em>velocity</em><em>.</em>
<em>The</em><em> </em><em>hockey</em><em> </em><em>will</em><em> </em><em>remain</em><em> </em><em>in</em><em> </em><em>it's </em><em>uniform </em><em>motion</em><em> </em><em>unless</em><em> </em><em>compelled</em><em> </em><em>by</em><em> </em><em>an</em><em> </em><em>exter</em><em>nal</em><em> </em><em>force</em><em>.</em>
Explanation:
Answer:
a) the acceleration of the block is 8.8 m/s^2
b) the time is 0.33 s
Explanation:
The first that we shall do is to draw the free body diagram, like the one that appears in the attached image. Let's see that the axis x and y were rotated for a better understanding of the equations developed.
We know that the movement with acceleration is the x-axis therefore the total amount of forces will be equal to the product of the mass and the acceleration.
The following step is to calculate the normal force, using the total forces in the y-axis that it is equal to 0. (because there is no movement in the y-axis).
By the definition of the friction force = normal force * friction coefficient. We can calculate the friction force and use it in the equation 1.
For the calculation of the time, we use the kinematics formulas.
Have in count that the body starts moving from the rest therefore v0 = 0
Answer:
Average velocity is 3.93 cm/s
Root mean square velocity is 4.79 cm/s
Velocity peak to peak is 6.28 cm/s
Explanation:
Speed of 2 particles = 5.3 cm/s
Speed of 4 particles = 1.4 cm/s
Speed of 6 particles = 7.14 cm/s
Speed of 8 particles = 1.52 cm/s
Speed of 2 particles = 7.68 cm/s
Average velocity is 3.93 cm/s
Root mean square velocity is 4.79 cm/s
Velocity peak to peak is 6.28 cm/s
Objects in motion tend to stay in motion unless acted upon by an unbalanced force. For example if the force of friction is not balanced with the applied force the object will accelerate in the direction of the applied force.