Definitions
What is work?
when a force moves something
Give an example of an up-and-down motion.
jumping rope
What 5 living and nonliving things do work?
people, animals, wind, water, machines
What is the difference between contact and noncontact forces?
contact forces: when objects touch (friction)
noncontact forces (when objects do not touch (gravity or magnetism)
What is position?
the place where an object is
Give an example of a back-and-forth movement.
swinging at the playground
Give an example of a balanced force.
a student sitting in a chair (5=5)
Why do force, motion, and speed work together?
God designed them to work together.
What is direction?
the way an object faces
Give an example of a round-and-round movement.
riding a carousel at the park
Give an example and equation for an unbalanced force.
a mom and a dad playing tug-of-war with their only child (50>10)
Why should we learn about balanced and unbalanced forces?
It helps us know what kinds of force to use when moving heavy objects.
What is distance?
how far an object travels
What two patterns of motion did God create in the beginning?
rotation and revolution
How can you use forces to do work better?
Use a path with less friction to push/pull a heavy object.
DAILY DOUBLE
Are mass and weight the same? Explain what happens to your mass and weight on different planets.
No. Your mass will stay the same, but your weight may change.
how fast/slow an object moves
Why can some motions NOT be predicted?
there is no pattern of motion
What is the difference between balanced and unbalanced forces?
Unbalanced forces: unequal in strength and has motion
How did forces begin at Creation?
Earth has day and night because the earth rotates, and it has different seasons because it revolves. Rotating and revolving are patterns of motion that cannot happen without force, which God created.