Speed Hoop
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Kore BMX Dirt jumping wheelset/wheel set 20” Speed Hoop al6061 front+rear |  |
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US $243.30 | 26d 8h 18m |
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Speed Hoop
A hollow cylinder (hoop) is rolling on a horizontal surface at speed = 3.7 m/s when it reaches a 18 degrees..?
A hollow cylinder (hoop) is rolling on a horizontal surface at speed = 3.7 m/s when it reaches a 18 degree incline.
How far up the incline will it go?
How long will it be on the incline before it arrives back at the bottom?
Because the problem indicated "hollow cylinder (hoop)" I think you are to consider rotational inertia. For a hoop,
I = M*R^2
Total up the linear kinetic energy and rotational kinetic energy at the bottom of the incline.
Original energy = (1/2)*m*v^2 + (1/2)*I*w^2
where w=v/R
The original energy will be totally converted to
gravitational potential energy = m*g*h
where h = d*sin18. Set Original energy = gravitational potential energy and solve for h. Find d.
The deceleration will be uniform, so the average velocity going up the incline will be (1/2)*3.7 m/s. Knowing average velocity and d, you can calculate the time to get to the highest point. Total time on the incline will be double that time.
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No items matching your keywords were found.
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Kore BMX Dirt jumping wheelset/wheel set 20” Speed Hoop al6061 front+rear | |
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US $243.30 | 26d 8h 18m |
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How to increase badminton reaction speed and accuracy?
I was thinking about wearing ankle weights while playing. As for accuracy, i have no clue. Sometimes my reaction is good, but others it sucks. Also i have very little accuracy. Can't shoot or serve a birdie into an area the size of a hula hoop. I wish to be able to travel the court quickly without dampering my reaction time. Is this possible?
baseball is boring to me and i suck at football.
O right, first badminton is a great sport. Be proud that you a fun of it. First of all, cool down when you are playing, your reaction may not be too good if you play too hot headed. Also, just play a lot of badminton when you have the opportunity. Reaction time comes from practice, it can also come from other sports, soccer and all others. So just, COOL DOWN and CHILL when you play and everything comes with practice!
