Physical ScienceGrade 6-8
Forces and Motion Answer Key
Investigate how forces affect the motion of objects and explore Newton's laws of motion.
Prior Knowledge Questions
Q1.What is a force?
Answer
A force is a push or pull that can change the motion of an object, measured in newtons (N).
Q2.What is Newton's First Law of Motion?
Answer
An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an unbalanced force (inertia).
Q3.What is the formula for calculating force?
Answer
Force = mass × acceleration (F = ma).
Activity A – Newton's Laws
Q1.What is Newton's Third Law of Motion?
Answer
For every action, there is an equal and opposite reaction.
Q2.How does friction affect motion?
Answer
Friction is a force that opposes motion; it slows objects down and converts kinetic energy into heat.
Related Gizmos
More Physical Science gizmos coming soon.