Educational worksheet on air resistance and friction featuring fill-in-the-blank questions and images to identify forces.

Let's solve the worksheet step by step.

---

Q1: Fill in the blanks with the words given in the word bank.

Word Bank:
friction – force – stops or slows – resistance – air resistance

---

1. Friction and air resistance are types of ________.
✔ Answer: *force*
👉 Explanation: Both friction and air resistance are forces that act on objects, so they are types of force.

---

2. Friction is the force that ________ objects which are sliding past each other.
✔ Answer: *stops or slows*
👉 Explanation: Friction opposes motion, so it either stops or slows moving objects.

---

3. A rolling ball will come to a stop because of ________.
✔ Answer: *friction*
👉 Explanation: The ball stops due to friction between the ball and the ground.

---

4. The force that opposes the force of gravity in the air is called the air ________.
✔ Answer: *resistance*
👉 Explanation: Air resistance acts upward against gravity when an object falls through the air.

---

5. ________ stops paper from falling quickly.
✔ Answer: *air resistance*
👉 Explanation: Paper has a large surface area and light weight, so air resistance significantly slows its fall.

---

✔ Q1 Answers:

1. force
2. stops or slows
3. friction
4. resistance
5. air resistance

---

Q2: Which type of force is present in the following pictures? Write ‘A’ for air resistance and ‘F’ for friction.

Let’s analyze each picture:

---

Picture 1: Person pushing a table
👉 The person is trying to move a heavy table, but it's hard to push due to contact with the floor.
✔ This shows friction between the table and the floor.
➡️ Answer: F

---

Picture 2: Parachute opening in the sky
👉 The parachute creates drag as it moves through the air, slowing the fall.
✔ This is air resistance.
➡️ Answer: A

---

Picture 3: Child sliding down a slide
👉 The child is sliding on the surface of the slide, and there’s resistance between the body and the slide.
✔ This is friction.
➡️ Answer: F

---

Picture 4: Paper airplane flying
👉 As the paper airplane moves through the air, it experiences air resistance, which affects its flight.
✔ This is air resistance.
➡️ Answer: A

---

Picture 5: Person riding a bicycle
👉 There are two possible forces:
- Friction between tires and road (needed to move forward).
- Air resistance acting against the rider.

But since the question asks for the type of force present, and both are present, we need to determine the most dominant one based on context. However, typically in such questions, air resistance is emphasized when moving through air at speed, and friction is key for motion.

But looking at the image — the cyclist is moving forward, and the main opposing force in motion is air resistance (especially if going fast), but friction is essential for movement (tires grip the road).

However, in this case, since the cyclist is moving, and the motion is being opposed by air, and air resistance is often highlighted in such contexts, but also friction is critical.

Wait — let's reconsider:
- The bike wheels roll, so rolling friction is present.
- But the main opposing force in air is air resistance.

But the question says "which type of force is present", and since both are present, we must decide based on what's most relevant.

In typical educational worksheets like this, air resistance is noted for moving objects in air, while friction is for contact surfaces.

But here, the bike is on the ground — so friction is necessary to move and stop.

Yet, the image emphasizes motion through air — so air resistance may be the focus.

But actually, friction is more fundamental for the bike to move forward (without slipping), and air resistance slows it down.

But the question likely wants us to identify the opposing force shown.

Looking at the context of the entire worksheet: It's about air resistance and friction, and the images are meant to distinguish them.

So:

- Pushing table: Friction (contact) → F
- Parachute: Air resistance → A
- Slide: Friction (sliding) → F
- Paper plane: Air resistance → A
- Bicycle: Both, but air resistance is significant during motion through air, and friction is needed for traction.

But in many similar worksheets, bicycles are used to show friction (between tires and road), not air resistance.

However, the primary resistance to motion in air is air resistance, especially if the rider is moving fast.

But again, without specific cues, let’s think:
The paper plane and parachute clearly show air resistance.
The table and slide clearly show friction.

For the bicycle, since it’s moving through air, and the rider is facing forward, air resistance is a major factor.

But in basic science education, bicycles are often associated with friction (e.g., brakes, tires gripping the road).

Wait — but the question says: “Which type of force is present” — implying the dominant or obvious one.

Given the context of the worksheet, and the fact that air resistance is the theme of this section, and the cyclist is moving through air, air resistance is likely intended.

But let’s look at standard answers in such sheets.

Actually, most educators would say that friction is present in the form of rolling friction and tire-road friction, which is essential.

But the air resistance is also present.

But since the question allows only one answer, and the bicycle is moving, and air resistance is a major factor in slowing it down, A might be correct.

But I think the better choice is F — because friction is required for the bike to move forward (without slipping), and it’s the contact force.

But wait — the paper plane has no contact with a surface — only air → A
Parachute → A
Table → F
Slide → F
Bicycle → F (because of tire friction)

Yes! The bicycle relies on friction between tires and road to move. Without friction, it wouldn't go anywhere.

So even though air resistance is present, the key force in this context is friction.

✔ So: F

---

✔ Final Answers for Q2:

1. Pushing table → F
2. Parachute → A
3. Sliding down → F
4. Paper airplane → A
5. Bicycle → F

---

✔ Full Worksheet Answers:

#### Q1:
1. force
2. stops or slows
3. friction
4. resistance
5. air resistance

#### Q2:
- Pushing table: F
- Parachute: A
- Slide: F
- Paper airplane: A
- Bicycle: F

---

🟩 Summary:

- Friction occurs between surfaces in contact.
- Air resistance occurs when objects move through air.
- Use F for contact-based resistance, A for air-based resistance.

Let me know if you'd like a printable version or explanation for students!