A3.0 kg ball tied to the end of a 50 cm long string being swung in a circle in a horizontal plane at constant speed. if the tension of the string is 3.8 n, what is the speed of the ball?
question 31 options:
a)
1.2 m/s
b)
1.0 m/s
c)
1.4 m/s
d)
0.8 m/s

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.