8. a child is riding on a merry-go-arround. as the speed of the merry-go- arround is doubled, the magnitude of the centripetal force acting on the child (1) remains the same (2) is doubled (3) is havled (4) is quadrupled
9. state the two general characteristic that used to defind a vector quantity.
Explain in details
physics problems(4)
2006-11-24 8:21 pm
回答 (1)
2006-11-25 5:44 pm
✔ 最佳答案
8.The centripetal force acting on the shild (4) is quadrupled9.Vectors are physical quantities that are described by both their direction and magnitude(size).
e.g. velocity
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