A downhill skiier reaches the steepest part of the trail. Her speed increases from 9m/s to 18m/s in 3 seconds. What is her acceleration?
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Acceleration= Velocity/Time
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Two objects repel each other. This repulsion could be due to *
(a) Frictional force only
(b) Electrostatic force only
(c) Magnetic force only
(d) Either a magnetic or an electrostatic force
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