Force
Motion
Gravity
Vocabulary
Miscellaneous
100
What is the rate of which an object changes position.
Speed.
100
How do you know when an object is in motion?
Its position changes.
100
Explain where the force is when throwing a ball in the air.
The push comes from the person pushing the ball from their hand. The pull comes from gravity pulling the ball back toward's Earth's center.
100
What word means the same as position?
location
100
What happens when you open a door? Use the terms: force, motion, and position in your answer.
I apply a pushing force to the door. The door moves away from me. The door's position changes as it opens. The motion of the door slows when I stop pushing.
200
What does this formula tell you? distance / time =
The speed of an object.
200
What would happen if more force were applied to a moving cart?
The cart would move faster.
200
Name 2 activities that require gravity.
Answers will vary. (ex.: basketball, football, frisbee, etc.)
200
What is a contact force that opposes motion of an object?
Friction.
200
If an ant crossed a rock in 5 seconds, and the rock was 30 mm. long. What is the ant's speed? Hint: distance/time = speed
The ant's speed is 6 mm/s.
300
What is the speed of a car moving 20 miles in 2 hours? Hint: 20/2 =
10 miles per hour.
300
What is friction?
Friction is a contact force that opposes the motion of an object.
300
Is gravity a contact or noncontact force?
Gravity is a noncontact force.
300
What is force?
A push or a pull.
300
If a beetle crossed a 40mm branch in 10 seconds. What is his speed?
The beetle's speed is 4mm/s.
400
Give an example of friction.
Ex. a grocery cart's wheels rubbing against the floor as the cart moves down the aisle
400
Without gravity, what would happen if you threw a ball straight up in the air?
It would continue to travel straight up and not come back down.
400
What is a noncontact force that pulls objects toward the earth's center?
Gravity.
400
If Mrs. Pagel drove 40 miles on the highway and it took her 1 hour. What was her speed?
Her speed is 40mph.
500
What does mass have to do with force?
The greater the mass, the more force is required to get the object moving.
500
Why would a pencil roll down a ramp but need force to move up a ramp?
To move up the ramp, the pencil needs to overcome gravity, which pulls the pencil down the ramp. I need to push the pencil up the ramp to overcome gravity.
500
How could you show that gravity affects an apple?
I could throw an apple in the air and watch it fall back to Earth.
500
The definition of motion.
What is the change in a position of an object?
500
Describe the difference between constant speed and variable speed. Give examples of each.
Constant speed doesn't stop moving. Variable speed changes speed. For example a car on the highway is at a constant speed, while a car stuck in traffice has a variable speed.
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