Balanced and Unbalanced Forces
An object sitting still has ___________ forces acting on it.
What is balanced?
A push or a pull.
What is force?
A train travels 240 miles in 2 hours. How fast is it going?
What is 120 miles per hour?
A boy pushes on a box and it moves across the room. This is an example of ______________ forces.
What is unbalanced?
Objects in motion stay in motion.
What is inertia?
A boy rides his bike 12 miles in 2 hours. Determine his speed.
What is 6 miles per hour?
The pencil is at rest on the desk. This is an example of ______________ forces.
What is balanced?
Causes heat when rubbing your hands together.
What is friction?
The airplane flew 400 miles in 2 hours. Determine the speed.
What is 200 miles per hour?
The ball is rolling down the hill. This is an example of _____________ forces.
What is unbalanced?
Distance traveled in an amount of time.
What is speed?
The sports car drove 500 miles in 5 hours. What was his speed?
What is 100 miles per hour?
A sky diver falling from the sky is an example of _______________ forces.
What is unbalanced?
When a moving object speeds up.
What is acceleration?
The school bus drove 80 miles in 2 hours. Determine the speed of the bus.
What is 40 miles per hour?