Toys and Forces Forces make toys work Forces make toys start moving change direction speed up slow down and stop moving Forces also change the shape of some toys Bouncing toys Floating toys Flying toys Rolling toys Sliding toys Spinning toys None of these toys would work without forces 4
What Is a Force A force is a push or a pull When you push something it moves away from you When you pull something it moves towards you When this boy applies a pushing force to the paper airplane it moves away from him When this girl applies a pulling force to the balloons they move toward her 5
How Does a Flying Toy Work A flying toy works by moving through the air A flying toy has a special shape which creates an upward pushing force called lift Lift keeps the toy in the air Boomerangs can fly because their shape creates an upward pushing force called lift 6
7 A flying toy can fly because its special shape creates lift When a flying toy moves the air above it flows faster than the air below it This air movement creates lift and the toy flies A boomerang creates lift because the air above it flows faster than the air below it boomerang slower air flow faster air flow lift
