1. Draw an arrow pointing backward at the point where the scooter's tires touch the ground.
2. Draw arrows pointing in opposite directions between the palms of the two hands as they rub together.
3. Draw an arrow pointing backward at the point where the person's feet touch the ground and at the point where the globe touches the ground.
4. Draw an arrow pointing backward at the point where the sled's bottom touches the ground.
5. Draw an arrow pointing backward at the point where the dog's paws touch the ground.
6. Draw an arrow pointing backward at the point where the person's hands and feet touch the ground.
Parent Tip: Review the logic above to help your child master the concept of friction forces worksheet.