Learn About Force: Friction Worksheets | 99Worksheets - Free Printable

Let’s go through each question one by one and pick the best answer based on what we know about force and motion.

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1. Pushing or pulling an object to produce motion is called

- a. gravity → That’s a pull from Earth, not general pushing/pulling.
- b. force → YES! Force is any push or pull that can make something move.
- c. playing → Not related to science here.

✔ Answer: b. force

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2. Gravity ________ objects down to Earth

- a. trips → No, that’s for people falling.
- b. pulls → YES! Gravity pulls things toward Earth.
- c. throws → No, gravity doesn’t throw — it pulls.

✔ Answer: b. pulls

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3. “Normal Force” pushes objects ________ to balance gravity

- a. sideways → No, normal force usually acts perpendicular to surface — often upward.
- b. upward → YES! If you’re sitting on a chair, the chair pushes up (normal force) to balance your weight (gravity).
- c. downward → That would be gravity itself.

✔ Answer: b. upward

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4. The force that can stop an object in motion is called

- a. resistance → This includes friction and air resistance — yes, these slow or stop motion.
- b. inertia → Inertia keeps things moving or still — it doesn’t stop them.
- c. gravity → Pulls down, but doesn’t always stop horizontal motion.

✔ Answer: a. resistance

*(Note: Sometimes “friction” is more specific, but “resistance” covers all forces that oppose motion.)*

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5. Some resistance forces are

- a. Star Wars rebels → Funny, but no 😄
- b. friction and air pressure → Close! Air *resistance*, not air pressure. But this is probably meant to mean air resistance.
- c. friction and gravity → Gravity isn’t a resistance force — it causes motion downward.

Actually, best answer should be friction and air resistance, so if “air pressure” is a typo for “air resistance”, then b is intended.

✔ Answer: b. friction and air pressure *(assuming they mean air resistance)*

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6. Things that can affect how fast or slow something moves are

- a. resistant forces → YES! Friction, air resistance — they slow things down.
- b. gravity forces → Gravity affects speed too (like making things fall faster), but not always slowing.
- c. ballet forces → Nope, not real 😊

But note: both resistance AND gravity can affect speed. However, the question says “things that can affect how fast or slow” — resistant forces specifically slow things down. Gravity can speed up or slow down depending on direction.

Looking at options, a is most directly about slowing down.

Wait — let’s read again: “how fast OR slow” — so anything that changes speed.

Gravity can make things go faster (falling) or slower (going uphill). Resistance always slows.

But option a says “resistant forces” — plural — which is correct.

Option b says “gravity forces” — weird phrasing, and gravity is one force.

Best choice: a. resistant forces

✔ Answer: a. resistant forces

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7. Inertia means a object will move in the ________ direction until another force affects it.

- a. same → YES! Inertia = tendency to keep doing what it’s doing — same speed, same direction.
- b. faster → No, inertia doesn’t make it faster.
- c. slower → No, unless a force acts.

✔ Answer: a. same

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8. If an object is not moving, it will stay that way until another force acts upon it.

This is Newton’s First Law — true!

- a. true → ✔
- b. false
- c. sometimes → Only if no net force — but statement says “until another force acts”, so it’s accurate.

✔ Answer: a. true

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9. Motion is cause by _______________

Typo: should be “caused”

- a. a push → Partially true
- b. a pull or push → YES! Both are forces — and force causes motion.
- c. a pull → Also partial

✔ Answer: b. a pull or push

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10. Circle ALL the things that affect how an object moves

Options:

- a. color → No, color doesn’t affect motion.
- b. weight → YES! Heavier objects need more force to move (mass matters).
- c. shape → YES! Affects air resistance — like a parachute vs. a rock.

So circle: b and c

✔ Answer: b. weight, c. shape

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11. When there is no force on a object, it

Again, typo: “an object”

Newton’s First Law: if no net force, object stays at rest or moves at constant velocity.

But options:

- a. does not move → Only if it was already stopped.
- b. moves very slowly → No, could be fast!
- c. moves very quickly → No, could be slow or stopped.

Hmm… none perfectly say “keeps doing what it was doing”.

But if it’s NOT moving, and no force — it stays not moving.

If it IS moving, and no force — it keeps moving.

The question says “when there is no force on an object” — doesn’t specify if it’s moving or not.

But look at option a: “does not move” — that’s only half true.

Wait — maybe they assume starting from rest? Or perhaps it’s poorly worded.

In many elementary contexts, they teach: “no force = no motion” — which is wrong scientifically, but common misconception.

Actually, let’s think: if NO force at all (including no gravity, no friction), then if it was moving, it keeps moving.

But in real life, if you remove all forces, it’s hard to imagine.

Perhaps the intended answer is a. does not move — assuming object starts at rest.

But that’s incorrect physics.

Wait — look back at Q8: it said if not moving, stays not moving until force acts — which is true.

Q11: “when there is no force on an object, it” — if it was moving, it continues; if not, it stays.

None of the options capture that.

Option a is closest if we assume object is at rest.

But actually, in standard tests, they might expect a — but it’s misleading.

Alternatively, maybe they mean “net force zero” — but still.

I think the best scientific answer isn't listed, but since Q8 covered the stationary case, and this is similar...

Wait — let's see the exact wording: “When there is no force on a object, it”

In reality, if truly no force, and it was moving, it keeps moving.

But perhaps in this context, they want a. does not move — implying if no force applied, it won’t start moving.

That makes sense for beginners.

For example, a book on table — no push, it doesn’t move.

So likely intended answer: a. does not move

✔ Answer: a. does not move

*(With note: technically, if already moving, it would keep moving — but for this level, they probably mean "won't start moving")*

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12. Circle ALL the different ways something can move

Options:

- a. roll → Yes, wheels, balls
- b. spin → Yes, tops, planets
- c. sleep → No, not a type of motion 😴

So circle: a and b

✔ Answer: a. roll, b. spin

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Now, compiling all answers:

1. b
2. b
3. b
4. a
5. b
6. a
7. a
8. a
9. b
10. b, c
11. a
12. a, b

Final Answer:
1. b
2. b
3. b
4. a
5. b
6. a
7. a
8. a
9. b
10. b, c
11. a
12. a, b