A small cube, with a mass of 3 kg, slides along a frictionless horizontal surface at a constant speed of 15 m/s until it collides with, and sticks to, a large wooden 4.5 kg
block. The large block is attached to the left end of a spring with a spring constant of
80 N/m as shown in the diagram.

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.