Chapter 12: Forces in the Physical World Flashcards
(50 cards)
A ______ is a push or a pull on an object.
force
Forces are measured in units called ______.
newtons
The force that resists motion between two surfaces is called ______.
friction
Gravity is an example of a ______ force because it acts without contact.
non-contact
When forces are ______, there is no change in motion.
balanced
When forces are ______, an object changes motion.
unbalanced
Newton’s Second Law is written as ______.
F = m × a
In the equation F = m × a, ‘m’ stands for ______.
mass
In the equation F = m × a, ‘a’ stands for ______.
acceleration
In the equation F = m × a, ‘F’ stands for ______.
force
The amount of matter in an object is its ______.
mass
The force of gravity on an object is its ______.
weight
On the Moon, your ______ stays the same, but your weight is less.
mass
The force that pulls objects toward the center of Earth is called ______.
gravity
A force that acts through touching is called a ______ force.
contact
A force that acts without touching is called a ______ force.
non-contact
Friction is an example of a ______ force.
contact
Gravity becomes weaker as the ______ between two objects increases.
distance
A free-body diagram uses ______ to show forces.
arrows
The force of gravity depends on ______ and distance.
mass
An object in motion will stay in motion unless acted on by a(n) ______ force.
unbalanced
To accelerate a heavy object more, you need to apply more ______.
force
The force that pulls falling objects back to Earth is called ______.
gravity
A ______ force causes a change in motion.
unbalanced
