A uniform meter stick has its center of mass at 50 cm mark. A mass of 50 gram is hung at 20 cm mark of the meter stick. An unknown mass is hung at 70 cm mark. The system is balanced at the fulcrum at 50 cm mark as shown in the figure. Find the unknown mass M. Question 2 options:

85 gram

100 gram

33.33 gram

14.29 gram

75 gram

The gravitational attraction between two objects will if one object acquires more mass .

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

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.