I NEED HELP ASAP DUE IN 30 MINUTES!!!
2 answers:
You might be interested in
The correct answers are :
<span>B. The wheels of a bike riding down the street
C. The blades of a fan that is turned on
D. A child sitting on a moving merry-go-round
Let's see why. Keep in mind that the angular momentum is defined as
</span>
<span>where m is the mass of the rotating object, v its velocity and r the radius of the circular trajectory.
</span><span>A. stationary Ferris wheel --> this one has no angular momentum, because its velocity is zero (the wheel is stationary), so v=0 and the angular momentum is zero: L=0
</span>
<span>B. The wheels of a bike riding down the street --> this one has angular momentum, because the edge of the wheel is moving with speed v
</span><span>C. The blades of a fan that is turned on --> this one also has angular momentum, because the fan is moving as well
</span><span>D. A child sitting on a moving merry-go-round --> also this one has angular momentum, which is given by
</span>
<span>where m is the child mass, v its velocity and r the radius of the merry-go-round.</span>
<span>B. The wheels of a bike riding down the street
C. The blades of a fan that is turned on
D. A child sitting on a moving merry-go-round
Let's see why. Keep in mind that the angular momentum is defined as
</span>
<span>where m is the mass of the rotating object, v its velocity and r the radius of the circular trajectory.
</span><span>A. stationary Ferris wheel --> this one has no angular momentum, because its velocity is zero (the wheel is stationary), so v=0 and the angular momentum is zero: L=0
</span>
<span>B. The wheels of a bike riding down the street --> this one has angular momentum, because the edge of the wheel is moving with speed v
</span><span>C. The blades of a fan that is turned on --> this one also has angular momentum, because the fan is moving as well
</span><span>D. A child sitting on a moving merry-go-round --> also this one has angular momentum, which is given by
</span>
<span>where m is the child mass, v its velocity and r the radius of the merry-go-round.</span>
Answer:
Explanation:
The equation of the position is:
Where:
v(i) is the initial velocity
The initial position y(i) will be zero and the final position y = 3.60 m.
So, we just need to solve this equation for v(i).
Therefore, the initial velocity is 10.10 m/s upwards.
I hope it helps you!