A 3.9 kg block originally at rest is pulled to the right, Ask an Expert

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Q. A 3.9 kg block initially at rest is pulled to the right along a horizontal, frictionless surface by a constant, horizontal force of 18 N.

Find the speed of the block after it has moved 4.9m.
Answer in units of m/s.

Q. An electric car is designed to run off a bank of 12.0 V batteries with a total energy storage of 2.00 107 J.

(a) If the electric motor draws 5.00 kW, what is the current delivered to the motor?

(b) If the electric motor draws 5.00 kW as the car moves at a steady speed of 20.0 m/s, how far will the car travel before it is "out of juice"?

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Category:- Physics
Reference No.:- M9272589

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