Page 143
1. Tangential speed is linear actual speed with unit m/s.
2. "Tangential speed is a speed of a point on the surface of spinning object". Rotational Speed is amount of revolution of a object does in certain time.
3.Tangential speed and the radial distance are direct proportion. (Example: windmill. The point at the top of the air wing has faster speed than the point close to the center of the windmill.)
Page 146
1. His rotational speed doesn't change because they are still in the same "circle", the same rotating body. However, his tangential speed is half of his friends' because tangential speed and radial distance are direct proportion.
3. The rotational speed of small wheel is twice than the big one because the diameter of the small wheel is half of the big wheel so the amount of revolution of small wheel is twice than the big wheel, during a certain time. But the tangential speed is equal to the big wheel because the belt bound them .
1. Tangential speed is linear actual speed with unit m/s.
2. "Tangential speed is a speed of a point on the surface of spinning object". Rotational Speed is amount of revolution of a object does in certain time.
3.Tangential speed and the radial distance are direct proportion. (Example: windmill. The point at the top of the air wing has faster speed than the point close to the center of the windmill.)
Page 146
1. His rotational speed doesn't change because they are still in the same "circle", the same rotating body. However, his tangential speed is half of his friends' because tangential speed and radial distance are direct proportion.
3. The rotational speed of small wheel is twice than the big one because the diameter of the small wheel is half of the big wheel so the amount of revolution of small wheel is twice than the big wheel, during a certain time. But the tangential speed is equal to the big wheel because the belt bound them .