Motion
What is motion?
Motion is a change in an object’s position over time.
What is light?
Light is a form of energy that travels in waves.
What is friction?
Friction is a force that resists motion between two surfaces that are touching.
What is gravity?
Gravity is a force that pulls objects toward each other.
What is Newton’s First Law of Motion?
An object stays at rest or keeps moving at a constant speed unless a force acts on it (law of inertia).
What is velocity?
Velocity is speed in a specific direction.
What is reflection?
Reflection happens when light bounces off a surface.
What is energy?
Energy is the ability to do work or cause change.
What two things affect the strength of gravity?
Mass of the objects and the distance between them.
What is Newton’s Second Law of Motion?
Force = Mass × Acceleration (F = ma)
How do you calculate speed?
Speed = Distance ÷ Time
What is refraction?
Refraction is when light bends as it passes through different materials, like glass or water.
What is kinetic energy?
Kinetic energy is the energy of motion.
Why do objects fall to the ground on Earth?
Because of Earth’s gravity pulling them down.
What is Newton’s Third Law of Motion?
For every action, there is an equal and opposite reaction.
What is acceleration?
Acceleration is the rate of change of velocity, or how quickly something speeds up or slows down.
What are mirrors used for in optics?
Mirrors reflect light to form images.
What is potential energy?
Potential energy is stored energy, like a stretched rubber band.
What tool do we use to measure the force of gravity on an object?
A spring scale, which measures weight.
Why does a heavier object need more force to move?
Because of its greater mass, based on Newton’s Second Law.
What is a reference point in motion?
A reference point is a stationary object used to determine if something is moving.
What causes a rainbow?
Rainbows are caused by refraction, reflection, and dispersion of sunlight in water droplets.
What is force?
Force is a push or pull that can change an object’s motion.
Is weight the same as mass? Explain.
No. Mass is the amount of matter; weight is the force of gravity on that mass.
What law explains why you fly forward in a car when it stops suddenly?
Newton’s First Law – your body wants to stay in motion.