Which of the following can apply a force?
a. people
b. machines
c. wind and water
d. All of the above
What is D all of the above
200
Which takes more force to move: a feather or basketball
What is a basketball
200
What causes a rock to fall down a hill by itself
What is gravity
200
This force can slow or speed you up and is located in the air
What is wind
200
To move something away from you
What is a push
200
A car can cover the same distance as an airplane, but it takes more time. This is because the airplane moves at a greater ?
What is speed
300
Why does it take more force to move a basketball compared to a feather?
What is the basketball weighs more
300
Joe moved a ball away from himself. He would have had to:
a. push it
b. pull it
c. use a spring scale
d. asked for help
What is push it
300
The movement of an object
What is motion
300
What tool do we used to measure force?
What is a spring scale
400
A boy is pulling a wagon with 10 books in it. If 7 books were removed, would the boy need more or less force to pull it?
What is less
400
Which of the following is a change in motion?
a. turning the corner
b. running faster
c. running slower
d. all of the above
What is all of the above
400
We run slower on sand compared to cement. What force causes this?
What is friction
400
how quickly an object is moving
What is speed
400
Name two actions that are not motion and two actions that are examples of motion.
What is Motion- twirling, bending, rolling
Not motion- thinking, dreaming, planning, hearing, seeing, thinking
500
What is force equal to?
What is Force = mass X acceleration
500
Which statements are true?
a. forces are acting on objects even when they dont move
b. force is required to change an object motion
c. many forces can act on an object at the same time
d. all of the above
What is D
500
a measure of the pull of gravity on an object
What is weight
500
What 2 things do we need to know to measure speed?
What is how far it travelled and how long it took to get there.