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Question. 1 :

1.     Mary can run at a top speed of 4.2m/s, whereas Deema can run only at 3.4m/s. They are to race a distance of 200m, starting at the same point. If the race is to end in a tie, how much sooner should Deema start running before Mary does.

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Question. 2 :

Stephen pushes two boxes P and Q, that stay in contact, along a rough table, with a force F of 30 N.

Box P has a mass of 2.0 kg and box Q has a mass of 4.0 kg. Both boxes move with constant speed.


The resultant force on box Q is:

A. 0N.

B. 5.0N

C. 15 N

D. 30N

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