Forces and Friction
What is a force?
A force is a push or pull on an object.
What is motion?
Motion is the change in position of an object over time.
What is velocity?
Velocity is the speed of an object in a specific direction.
Give an example of cause and effect in motion.
An example of cause and effect is pushing a toy car (cause) and it rolling away (effect).
What is a simple machine?
A simple machine is a device that makes work easier by allowing us to apply force in a more effective way.
What are balanced forces?
Balanced forces are forces that are equal in size but opposite in direction, resulting in no change in motion.
What is distance?
Distance is the total length of the path traveled by an object.
What is acceleration?
how fast an object speeds up or slows down
How do forces cause changes in motion?
by either speeding up, slowing down, or changing direction
Name the 6 types of simple machines
the six types of simple machines are the lever, pulley, inclined plane, wedge, screw, and wheel and axle.
How do unbalanced forces affect motion?
Unbalanced forces cause an object to accelerate, change direction, or change shape.
How is distance measured? What tools can you use?
Distance can be measured using tools like a ruler, odometer, or measuring tape.
Give an example of something that is accelerating.
A car speeding up as it goes from a stoplight to a higher speed is an example of something that is accelerating.
What can cause an object to stop moving?
An object can stop moving if a force acts on it in the opposite direction of its motion, such as friction.
How does a lever work?
A lever works by using a fulcrum to lift or move an object. When force is applied to one end of the lever, the other end moves in the opposite direction, allowing you to lift a heavier object with less effort.
When is a force zero
When an object is at rest, not moving
How does a bigger force affect distance?
The object will go farther.
Why is distance important in understanding motion?
When a force is applied to an object at rest, it will start to move in the direction of the applied force.
How does gravity affect objects?
Gravity pulls objects towards the earth, affecting their motion and speed
What is the purpose of a pulley?
The purpose of a pulley is to change the direction of a force or to lift heavy objects more easily by using a rope that moves over a wheel.
Explain how friction acts as a force
Friction is a force that opposes motion between two surfaces in contact.
How does a smaller force affect distance?
The object will go a shorter distance.
How is velocity different from speed?
Velocity includes direction.
Describe a real-life situation where you see cause and effect with forces.
When you push a swing (cause), it moves back and forth (effect) due to the force applied.
Give an example of how a simple machine makes work easier.
A ramp (inclined plane) makes it easier to lift heavy objects to a higher level by allowing you to roll or slide the object up instead of lifting it straight up.