THIRD QUARTER - ACTIVITY SHEET

Name: ____________________________________________________________________________________________

ACTIVITY NO. 1: ROLL AND STOP

Procedure:
1. Get the ball or any available round object and put it on the floor.
2. Push the ball gently to allow it to roll on the floor.
3. Observe the movement of the ball.

Questions:

1. What happened to the ball after it was pushed? To answer this question, arrange the following events according to
which happened first to last. Put the numbers 1 (first), 2, and 3 (last) on the blank before the sentence.
______The ball slows down. ______The ball stopped. ______The ball rolled on the floor.

2. What caused the stopping of the ball?

3. Which of the following statements is/are TRUE about friction? Choose from the given statements below. Encircle the
letter of your answer.
A. Friction is produced by a single object.
B. Friction is a force that opposes motion.
C. Friction is an energy that moves the object.
D. Friction acts opposite to the direction of an object’s motion.
E. Friction exists between the surfaces of two objects rubbing against each other.

ACTIVITY NO. 2: ROLLING AND SLIDING

Procedure:
1. Perform this activity on a floor or on a long table.
2. Put a mark on the floor. Place the ball on the mark.
3. Push the ball gently. Mark the point where the ball stopped. Repeat the steps two more times.
4. Replace the ball with a small box. Place it on the same mark where the ball was initially placed.
5. Apply the same amount of push to the box as was given to the ball.
6. Put a mark on the point where the small box stopped. Repeat the steps two more time

Questions:

1. Answer the following questions by choosing between the ball and the box. Write your answers on your answer sheet.

2. Based on the activity, complete the following statements by choosing the word that best completes the following
sentences. Write the words you have chosen on your answer sheet.
A. Why does the ball and the box travel at different distances?
The ball and the box travelled different distances because of the difference in their (shape/surface area, push
applied).

B. How does friction affect the movement of objects with big or small surface areas?
An object with a bigger surface area, experiences a (greater, lesser) friction while an object with a smaller surface
area has a(greater, lesser) friction.

C. How does friction affect the movement of objects such as the ball and the box?
Friction makes moving objects (slowdown, get faster). It can also (stop, move) move objects.

D. In this activity, what is the factor affecting friction? (shape/surface area, distance travelled)
ACTIVITY NO. 3: FALLING OBJECTS

Procedure:
1. Prepare two sheets of identical papers. Crumple one of the papers.
2. Raise the two pieces of paper to the same height,
3. Drop the papers at the same time. Observe which object reached the floor first. This will be your first trial.
4. Repeat dropping the papers two more times and observe. These will be your second and third trials.

Questions:

1. Fill in Table1 by writing the word “First” or “Last” according to the order the paper fell on the ground per trial.

2. Based on your answer in Table 1, between the crumpled paper and the uncrumpled one, which object reached the floor
first?
A. crumpled paper
B. plain paper

3. Does air affect the falling of the two papers? Why?

4. Which object experienced the greater opposing force of the air? Why?
A. The crumpled paper because it has a small surface area in contact with the air.
B. The plain paper because of its wide or big surface area in contact with the air.

5. How does air friction affect the movement of falling objects? Choose the correct answer inside the parenthesis.
Air friction (A. slows down, B. increases) the motion of falling objects.

ACTIVITY NO. 4: ROUGH AND SMOOTH

Procedure:
1. Perform this activity on a long table or the floor.
2. Set up all the materials.
3. Cover one side of the table with a cloth (like towel). The covered portion will represent rough surface and the
uncovered portion, a smooth surface.
4. Place the ball at the starting line of the smooth surface.
5. Push the ball gently. Mark the point where the ball stopped. Repeat two more times.
6. Do the same for the rough surface this time. Repeat two more time

Questions:

1. Answer the following questions by completing Table 2. Write your answers on your answer sheet.

2. How does friction differ in a smooth surface from a rough surface?

3. How does friction affect the movement of objects in smooth and rough surfaces?
Objects move (faster, slower) in smooth surface. Object moves (faster, slower) in rough surface.

4. In this activity, what is the factor affecting friction? (surface texture, mass).