Science 8 STAAR Review: Physics Flashcard

Front

What are unbalanced forces?

Back

Unbalanced forces are forces that cause an object to accelerate or change its motion. They occur when the net force acting on an object is not zero.

Front

What is the definition of balanced forces?

Back

Balanced forces are forces that are equal in size but opposite in direction, resulting in no change in motion. The net force is zero.

Front

What is net force?

Back

Net force is the overall force acting on an object when all the individual forces are combined. It determines the object's acceleration.

Front

How do you calculate net force?

Back

Net force is calculated by adding all the forces acting on an object, taking into account their directions. For example, 10N to the right and 5N to the left results in a net force of 5N to the right.

Front

What is the relationship between force and motion?

Back

Force is a push or pull that can cause an object to move, stop, or change direction. The motion of an object is directly affected by the net force acting on it.

Front

What is speed?

Back

Speed is the distance traveled per unit of time. It is a scalar quantity and does not include direction.

Front

What is velocity?

Back

Velocity is the speed of an object in a specific direction. It is a vector quantity.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object. It can be caused by a change in speed or direction.

Front

What is the formula for calculating acceleration?

Back

Acceleration (a) is calculated using the formula: a = (final velocity - initial velocity) / time.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. It is directly related to the mass of the object.