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Question1

On vacation, your 1350 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 1.90 m/s2.

(a) What is the net force exerted on trailer?

(b) What force does the trailer exert on car?

Question2

One rechargeable battery of mass 15.0 g delivers to a CD player an average current of 18.0 mA at 1.60 V for 2.40 h before battery needs to be recharged. The recharger maintains a potential difference of 2.09 V across the battery and delivers a charging current of 13.5 mA for 4.20 h.

What is the effectiveness of the battery as an energy storage device?

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