Force and Motion
When you write a letter, what holds the desk and you to the floor?
Gravity
____________ between your fingers and the pen keeps the pen upright.
friction
You can probably pick up an apple exerting just one __________ of force.
A Newton
Riding down a hill on your bicycle, slowing down, and turning are all examples of_________?
acceleration
When you watch a football game from a seat near the top of the stadium, your position and all the things around you are part of your ___________?
Frame of reference
Motion is stopped and started by ________?
force
____________ is a measure of the force of gravity and varies from planet to planet.
Weight
To find a runner’s _________, you need to know the distance he or she ran and the time it took.
Speed
How do you know if a runner is in motion? He keeps changing his ______________
Position