Red
An object that is sitting still has what forces acting on it?
Balanced or unbalanced?
Balanced
A boy pushes on a box and moves it across the room. This is an example of
Balanced forces
unbalanced forces
unbalanced forces
What makes sky divers fall?
gravity
What is gravity?
force pulling us towards earth
A kid kicks a ball. What force made the ball move?
the kids leg kicking
Two kids are playing tug of war. As they are pulling, no one is moving. Is that a balanced force or an unbalanced force?
balanced force
Inertia is the tendency of an object in motion to stay in motion or of an object at rest to stay at ______
rest
What is the word for a change in an objects position
motion
The definition of ______ is a push or a pull
force
The distance traveled in an amount of time is called _______
speed
inertia
acceleration
speed
What causes heat when rubbing your hands together?
friction
_________ is how fast an object's position changes over time.
speed
Objects in motion tend to stay in motion because of the property of _____?
Inertia
gravity
inertia
Dana is the pitcher for her community baseball team. What force causes the baseball to change directions when it is hit by the bat?
The batter's force on the ball with the bat
What is an example of a balanced force?
answers vary
What is an example of an unbalanced force?
answers vary
____________ describes when a moving object speeds up.
acceleration
velocity
acceleration
What causes sky divers to fall slower?
air resistance
What causes a crumpled up piece of paper to fall faster than a flat piece of paper?
the surface area of the objects
If you drop a rock in a lake, the rock will slow down because the water exerts
gravity
less resistance
drag forces
velocity
drag forces
What is the force acting on a person sitting in a chair
gravity
explain how parachutes work using science words
answers vary. use surface area, gravity, or air resistance
What is the definition of friction?
A force between surfaces that slows objects or stops them from moving
what is drag force
motion in air or water cause more resistance
The speed and direction of an object is ______
velocity