If a football is kicked from the ground with a speed of 16.71 m/s at an angle of 49.21 degrees, then the vertical component of the initial velocity would be 12.65 m/s
<h3>What is Velocity?</h3>
The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object. The unit of velocity is meter/second.
As given in the problem A football is kicked from the ground with a speed of 16.71 m/s at an angle of 49.21 degrees
The horizontal component of the velocity is given by
Vx = Vcosθ
The vertical component of the velocity is given by
Vy = Vsinθ
As we have to find the vertical component of the velocity given that speed of 16.71 m/s at an angle of 49.21 degrees from the ground
Vy = 16.71 × sin49.21°
Vy = 12.65 m/s
Thus, the vertical component of the velocity would be 12.65 m/s
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Answer:
32 bottles
Explanation:
If we create a free body diagram on the child we have his weight and the bouyant force
W-B=0
They must be equal to mantain equilibrium on the body and he can stay floating, this force is equivalent to the weight of water displaced
W=B=Ww
Mg=mg
32 kg=mass of water displaced
1 kilogram per liter (kg/L) is the density of water, this means that 32 Liters of water are displaced and since the bottles can retain 1 liter, the child needs 32 bottles
Answer:
d. displacement
Explanation:
Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.
For example a Helium-4 nucleus has two protons and two neutrons. The mass of the Helium-4 nucleus is less that the masses of two free protons and two free neutrons.
Answer: The correct answer is "the same as the sum".
Explanation:
The expression for the equivalent resistance in the series combination of the circuit is as follows;
![R'=R_{1} +R_{2} +R_{3}](https://tex.z-dn.net/?f=R%27%3DR_%7B1%7D%20%2BR_%7B2%7D%20%2BR_%7B3%7D)
Here, R' is the equivalent resistance,
are the resistances.
The expression for the equivalent resistance in the parallel combination of the circuit is as follows;
![\frac{1}{R'} =\frac{1}{R_{1}} +\frac{1}{R_{2}}+\frac{1}{R_{3}}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7BR%27%7D%20%3D%5Cfrac%7B1%7D%7BR_%7B1%7D%7D%20%2B%5Cfrac%7B1%7D%7BR_%7B2%7D%7D%2B%5Cfrac%7B1%7D%7BR_%7B3%7D%7D)
Here, R' is the equivalent resistance,
are the resistances.
In the series combination of the circuit, the equivalent resistance is more than the equivalent resistance in the parallel combination of the circuit.
In the series combination of the circuit, the same amount of current flows across the resistance but the voltage is different across the resistances.
Therefore, for resistor in series, the equivalent resistance is the same as the sum.