Which of the following best describes a non-contact force?

A force that acts between objects without them touching

A force that requires two objects to touch

A force that acts only underwater

A force that only acts on living things

A book is lying on a table. Which forces are acting on the book to keep it in balance?

Gravity pulling it down and the normal force pushing it up

Only the normal force pushing it up

Friction and gravity pulling it sideways

Which of the following situations involves both a contact force and a non-contact force acting on the same object?

A ball rolling on the ground under gravity while friction slows it down

If you push a heavy box and it does not move, what can you conclude about the forces acting on it?

The forces acting on the box are balanced

Which of the following correctly classifies tension force?

Contact force because it acts through a rope or string that is physically connected

Non-contact force because it acts at a distance

Gravitational force because it pulls objects down

Magnetic force because it attracts objects

A student pushes a toy car on two different surfaces — one smooth and one rough. The car travels farther on the smooth surface. Using your knowledge of forces, explain why this happens and identify the forces involved.

The car travels farther on the smooth surface because there is less friction on smooth surfaces, so less opposing force slows the car down

The car travels farther on the smooth surface because gravity is stronger on rough surfaces

The car travels farther on the smooth surface because the applied force is greater on smooth surfaces

The car travels farther on the smooth surface because magnetic force helps it move forward

Two teams are playing tug of war. Team A pulls with a force of $$200 \text{ N}$$ and Team B pulls with a force of $$150 \text{ N}$$ in the opposite direction. What is the net force and in which direction will the rope move?

Net force = $$50 \text{ N}$$ , rope moves toward Team A

Net force = $$350 \text{ N}$$ , rope moves toward Team B

Net force = $$50 \text{ N}$$ , rope moves toward Team B

Net force = $$0 \text{ N}$$ , rope does not move

A skydiver jumps from a plane. Initially, gravity pulls the skydiver down. As the skydiver falls faster, air resistance increases. What happens when air resistance equals gravity?

The skydiver falls at a constant speed because the forces are balanced

The skydiver speeds up even more

A student wants to move a heavy rock. She tries pushing it but it does not move. She then uses a lever to apply force. Using your understanding of forces, why does the lever help her move the rock?

The lever increases the applied force on the rock, making the net force large enough to overcome friction and move the rock

The lever removes gravity from the rock

The lever creates a magnetic force that lifts the rock

The lever reduces the weight of the rock

A ball is thrown upward. As it rises, gravity acts downward on it. Which of the following best explains what happens to the ball's speed as it rises, and why?

The ball slows down because gravity acts as an opposing force against the direction of motion

The ball speeds up because gravity pushes it upward

The ball maintains the same speed because gravity is a non-contact force

The ball slows down because friction in the air is the only force acting on it

A student places two bar magnets near each other with their north poles facing each other. She notices they push apart. She then flips one magnet so the north pole faces the south pole. What will happen and why?

They will attract each other because opposite poles of magnets attract, which is a non-contact force

They will still push apart because magnetic force always repels

They will attract each other because of gravitational force between them

Nothing will happen because magnets only work when touching

A box is being pulled by two forces: Force A = $$30 \text{ N}$$ to the right and Force B = $$30 \text{ N}$$ to the left. A student claims the box will move to the right. Is the student correct? Explain using the concept of balanced and unbalanced forces.

No, the student is incorrect because the forces are balanced (net force = $$0 \text{ N}$$ ), so the box will not move

Yes, the student is correct because Force A is applied first

Yes, the student is correct because contact forces always win over non-contact forces

No, the student is incorrect because Force B is stronger

A cyclist is riding on a flat road. She stops pedaling but continues to move forward for a while before stopping. Using your knowledge of forces, which forces are acting on the cyclist after she stops pedaling, and how do they affect her motion?

Friction and air resistance act as opposing contact forces that gradually slow her down until she stops

Only gravity acts on her, pulling her to a stop

Magnetic force from the road slows her down

No forces act on her after she stops pedaling, so she should keep moving forever

A student is designing an experiment to compare how different surfaces affect the friction force on a sliding block. She slides the same block on wood, carpet, and ice. She measures the distance the block travels on each surface after being given the same push. Which surface will have the greatest friction force, and how would you expect the block's travel distance to compare across the three surfaces?

Carpet will have the greatest friction; the block will travel the shortest distance on carpet and the farthest on ice

Ice will have the greatest friction; the block will travel the shortest distance on ice

Wood will have the greatest friction; the block will travel the shortest distance on wood and the farthest on ice

All surfaces will have the same friction; the block will travel the same distance on all surfaces

Understanding Forces and Their Types

Authored by Marilaine Ruiz

Biology

5th Grade

Used 1+ times

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30 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is force?

The color of an object

A push or pull acting on an object

The weight of an object

The size of an object

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is the SI unit of force?

Kilogram

Meter

Newton

Joule

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of force requires physical contact between two objects?

Magnetic force

Gravitational force

Contact force

Electrostatic force

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of a non-contact force?

Friction

Applied force

Tension

Gravity

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is friction?

A force that pulls objects toward the Earth

A force that opposes the motion between two surfaces in contact

A force that acts at a distance

A force that pushes objects apart

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a contact force?

Gravitational force

Magnetic force

Muscular force

Electrostatic force

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to an object when an unbalanced force acts on it?

It stays still

It changes its state of motion

It disappears

It becomes heavier

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Understanding Forces and Their Types

What is force?

Which of the following is the SI unit of force?

What type of force requires physical contact between two objects?

Which of the following is an example of a non-contact force?

What is friction?

Which of the following is a contact force?

What happens to an object when an unbalanced force acts on it?

Which force keeps planets in orbit around the Sun?

What type of force is exerted by a stretched rubber band?

Which of the following best describes a non-contact force?

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