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  1. Take upward direction be positive. Then, find out the height gained by the rocket...15(2) v = 30 ms-1 So, the velocity of the rockect is 30 ms-1 upward . After 2 seconds, the rocket experiences a downward force...

  2. ...therefore, choice, price competition and non-price competition are needed b. put upward pressure on price means the price competition, so it is the right answer.

  3. ...more the water is pushed to the sides, the bigger the upward force. When the upward force is greater than gravity, the object...

  4. ...not provided I assume the object at 0 m when time t = 0 Let upward motion be positive Initial velocity u = 24.2 m/s Gravitational acceleration...

  5. ... an angle of 20 degree to thge horizontal. The boy applies an upward force of 20N parallel to the plane. a. what is the net force ...

  6. ...140)*(0.05)=9 plus (-7)=-2 2007-01-29 00:02:17 補充: c) F=ma a = 140( upward ), m=0.06kgF= 0.06*140=8.4N( upward ) 2007-01-29 00:08:49 補充: now...

  7. First, face a poker 脾 card to with an upward exposure put on the performance table, time card's fold that put should should a little...

  8. ... it can help you. (a) Dolphin from 1m below the water surface upward to the ball (the total of distance is 3m) so it should be 3m-1m = 2m (the ball...

  9. .... People will rush to somewhere they think safe. They will face upward , worrying about that objects may fall from height. etc.

  10. ... of bird are hollow to make itself light enough to be liftedby the upward force excerted by the wings.