Force
What is force?
A push or pull upon an object resulting from the object's interaction with another object.
What is magnetism?
When certain metals attract and repel.
What is gravity?
The force that attracts a body toward the center of the earth, or toward any other physical body having mass.
What is the difference between a push and a pull?
A push moves an object away, while a pull brings it closer.
What is friction?
Friction is when two things rub against each other, and it makes it harder for them to move.
Name two types of forces.
Magnetism and gravity.
What tool do we use to test magnetism?
Magnet.
Is gravity a pulling force or a pushing force?
Pulling force.
Give an example of pushing and pulling in everyday life
Pushing a door to open it, pulling a drawer to close it. Answers may vary.
What happens when you slide down a slide?
Friction between your clothes and the slide slows you down a bit.
How can you increase the force on an object?
By applying more force to it.
What tool do we use to navigate using the Earth’s magnetic field?
A compass.
Explain how gravity is involved when a ball is kicked in the air.
Gravity is a pulling force that pulls the ball back down to the surface of the Earth.
How do pushes and pulls affect the motion of an object?
They can start, stop, or change the direction of an object’s motion.
Why do we use oil in a bike chain?
Oil helps reduce friction, so the bike chain moves smoothly and doesn't stick.
What is the unit of measure for force?
The newton (N).
What happens to the force of magnetism when the distance between the object and the magnet is increased?
The force of magnetism decreases
What happens to the force of gravity when the distance between objects increases? Does it increase or decrease?
The force of gravity decreases.
Is magnetism a pushing force or a pulling force?
Magnetism is both. When opposite poles are aligned it is a pulling force because the poles attract. When the same poles are aligned it is a pushing force because they repel.
Why is it harder to walk on ice than on a sidewalk?
Because there is less friction on ice, so it’s slipperier than a sidewalk.
How is the amount of force related to the acceleration of an object?
The greater the force that is applied the greater the acceleration.
How do we know that the Earth has a gravitational pull that affects us?
We know gravity exists because we can drop an object and observe its effects as it falls.
Explain how gravitational force is related to the orbit of planets around the sun.
Gravitational force keeps planets in orbit around the sun; it provides the necessary force to maintain the orbits.
Explain how pushing and pulling forces are involved in a game of tug of war.
Pulling a rope in tug-of-war involves both teams pulling while also pushing the ground with their feet for better grip.
How do car brakes use friction to stop a moving car?
When you push the brake pedal, brake pads press against the wheels, using friction to slow down the car.