After falling from rest from a height of 35 m a 0.58-kg, Ask an Expert

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Q1. After falling from rest from a height of 35 m, a 0.58-kg ball rebounds upward, reaching the height of 26 m. If the contact between ball and ground lasted 2.5 ms, what average force was exerted on ball?

Q2. An electron is accelerated through 2470 V from rest and after that enters a region where there is a uniform 1.80 T magnetic field. What are the maximum and minimum magnitudes of magnetic force acting on this electron?

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