Activity 1 4p263f

Activity 1 “Charge” it to experience! Objectives: After performing this activity, you should be able to: 1. observe that objects may attract or repel each other, 2. infer that objects may carry positive and negative charges, and 3. deduce that neutral objects contain positive and negative charges

Materials Needed: meterstick or any meter-long stick balloons string chairs or any stand for the stick glass (from a picture frame) cloth (flannel or silk cloth)

Procedure: 1. Inflate the two balloons. Tie each using a length of string. Place the meter-long stick across two chairs. Suspend the two balloons so that they hang freely about two inches apart. 2. With each hand holding one balloon, rub the balloons simultaneously against your hair several times. Let go of the balloons. Observe. Q1. What happened with the balloons? Q2. Did the balloons acquire the same charge or different charges? What made you say so? 3. Rub the piece of glass with a silk cloth. Bring the piece of glass between the two balloons. Observe. Q3. What happened with the balloons? Q4. Does the glass have a different or same charge as the balloon? What made you say so?