JeopardyFRICTION GRAVITY BALANCED

UNBALANCEDMAGNETICELECTROSTATIC FORCES

Q $100

Q $200

Q $300

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Q $500

Q $100 Q $100Q $100 Q $100

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Q $300 Q $300 Q $300 Q $300

Q $400 Q $400 Q $400 Q $400

Q $500 Q $500 Q $500 Q $500

Final Jeopardy

$100 Question from Friction

What kind of force is friction? Is it a pushing force or a pullingforce?

$100 Answer from Friction

It is a pushing force.

$200 Question from Friction

Why do engineers and mechanics have to reduce the friction between moving parts in engines?

$200 Answer from Friction

The rubbing of the engine parts causes heat, which will cause the engine to catch fire if the friction is not reduced. Mechanics use oil to reduce the friction.

$300 Question from Friction

What is the definition of Friction?

$300 Answer from Friction

Friction is a rubbing force that resists (tries to stop) the motion between two surfaces that are touching.

$400 Question from Friction

In the jet car experiment, if you wanted the car with 4 nickels to travel the same distance as the car with 1 nickel, what could you do?

$400 Answer from Friction

•Put more air into the balloon.

•Take 3 nickels off.

•Decrease the friction between the wheels and the floor.

$500 Question from Friction

If two cars were racing on ice, andboth cars were identical except one was 1000 pounds heavier, whichone would probably win the raceand why?

$500 Answer from Friction

The heavier car would probably win because theadded weight would create more friction between thecar and the ice, which is what it would need to moveon the slippery surface.

$100 Question from Gravity

What type of force is gravity? Is it a pushing force or a pulling force?

$100 Answer from Gravity

It is a pulling force.

$200 Question from Gravity

How does the mass of an objectaffect gravity?

$200 Answer from Gravity

The more mass an object has, the strongerits gravitational pull.

$300 Question from Gravity

What is the relationship betweendistance and gravitational pull?

$300 Answer from Gravity

The closer an object is to a planet or moon, the stronger the gravitational pull.

$400 Question from Gravity

If you were on the moon, how wouldyour weight compare to your weight on Earth? Use gravity to explain youranswer.

$400 Answer from Gravity

You would weigh less on the moonbecause the moon has less mass thanEarth, (it is smaller) and so its gravitationalpull would not be as strong as Earth’s.

$500 Question from Gravity

How does gravity affect the motionof a roller coaster car?

$500 Answer from Gravity

Gravity can give the roller coaster energy.When the coaster car is at the top of a hill, gravity pulls it down, and the car speedsup. When the car goes up a hill, gravity pullson the car and slows it down.

$100 Question from Balanced and Unbalance.

This type of force causes all changesin the speed and direction of an object.It can make resting objects move, or changethe speed or direction of moving objects.

$100 Answer from Balanced and Unbalance

Unbalanced Forces

$200 Question from Balanced and Unbalance

This type of force causes objects to be at rest or moving at a constant speed.

$200 Answer from Balanced and Unbalance.

Balanced Force

$300 Question from Balanced and Unbalance.

Give two examples of unbalanced forces acting on an object.

$300 Answer from Balanced and Unbalance.

• A car driving out of the driveway.• A person throwing a basketball into a hoop.• A bike skidding to a stop.

$400 Question from Balanced and Unbalance.

Give 4 examples of balanced forces. Two examples of the two different ways balances forces can affect objects.Hint: When forces are balanced objects are either at ___________ or moving_ _______ ________.

$400 Answer from Balanced and Unbalance.

• A book sitting on a table.• A car, turned off, and sitting in the driveway.• The hour hand on a clock.• A satellite orbiting Earth.

$500 Question from Balanced and Unbalance.

Describe the activity we did in class to show balanced and unbalanced forces, and describe how we could tell if the forces were balanced or unbalanced.

What would have to happen for the forces to be balanced?

$500 Answer from Balanced and Unbalance.

We played tug-of-war and put the six largest kidson one side of the rope and the six smallest kids on the other side of the rope to show unbalanced forces.

We put kids of equal size on both sides to try to show balancedforces.

To make the forces balanced each side would have to have thesame amount of weight and the same amount of pulling force.

$100 Question from magnetic and electrostatic forces.

What type of force is magnetic force? Is it a pulling force or a pushing force?

$100 Answer from magnetic and electrostatic forces.

Both. Magnets can push and pull.

$200 Question from magnetic and electrostatic forces.

What type of force is an electrostatic force, a pushing force or a pulling force?

$200 Answer from magnetic and electrostatic forces.

It’s a pulling force.

$300 Question from magnetic and electrostatic forces.

What do gravity, magnetic and electrostatic forces all have in common?

$300 Answer from magnetic and electrostatic forces.

They all can exert a force on objects without touching them.

$400 Question from magnetic and electrostatic forces.

What determines whether a magnet will push or pull?

$400 Answer from magnetic and electrostatic forces.

Opposite ends attract or pull, and like endsrepel or push.

$500 Question from magnetic and electrostatic forces.

•Compare Electrostatic forces and Magnetic forces.

•Give two ways they are alike.

•Give two ways they are different.

$500 Answer from magnetic and electrostatic forces.

ALIKE•Magnetic and electrostatic forces can both pull on objects andthey can act on objects without touching them. DIFFERENT• Magnetic forces only work on certain metals and electrostaticforces work on light objects like paper and feathers.

• Magnetic forces can push and pull but electrostatic forces can only pull.

$100 Question from Forces

This is a push or pull that causes an object to move or changeshape.

$100 Answer from Forces

A Force.

$200 Question from Forces

When forces are ___________objects will change speed and/ordirection.

$200 Answer from Forces

Unbalanced

$300 Question from Forces

This is friction between the airand an object.

$300 Answer from Forces

Air Resistance

$400 Question from Forces

When forces are ______________ an object must be at rest or in constant motion.

$400 Answer from Forces

Balanced

$500 Question from Forces

This is the upward force that pushes upon an object that is in liquid or gas.

$500 Answer from Forces

Buoyancy

Final JeopardyDraw a picture of a person throwing a football. Show the path theball takes as it travels through the air and comes to a stop.

In the picture, label the forces that affect the ball’s motion. Use the following words at least once: upward force, gravity, friction, andair resistance.

Write at least 3 sentences describing the ball’s motion. Use a least 6 of the following words: speed, up, down, curved path, slower, faster,balanced, unbalanced, pull, push, gravity, and friction.

Final Jeopardy AnswerThe person uses an upward force to throw the ball into the air. Gravity pulls the ball down in a curved path. Air resistance pushes

against the ball and slows it down. The ball hits the ground and friction between the ball and the ground slows the ball down until

it comes to a stop.