1. Once you start moving, you will continue to slide forward at a constant speed in a straight line unless an unbalanced force (like friction or hitting the wall) acts on you.
2. Velocity is speed with a direction, while speed is just how fast something is moving regardless of direction.
3. Friction opposes the motion of a moving object, slowing it down and eventually stopping it by acting as an unbalanced force.
4. A force must be applied to the ball (e.g., someone kicking it back) to overcome its inertia and change its state from rest to motion toward your friend.
5. Heavier objects have more inertia; they resist changes in their state of motion more than lighter objects.
6. Your body tends to continue moving straight ahead due to inertia, so when the car turns left, you feel like you are shifting to the right relative to the car.
7. An object at rest will remain at rest unless acted upon by an unbalanced external force.
Parent Tip: Review the logic above to help your child master the concept of newton first law worksheet.
