Common Assessment #1 Grade 7 Force and Motion (M)

Front

What is friction?

Back

Friction is a force that opposes the motion of an object. It occurs when two surfaces come into contact with each other.

Front

What is an unbalanced force?

Back

An unbalanced force is a force that causes an object to change its motion. It occurs when the total forces acting on an object are not equal.

Front

What is the acceleration due to gravity on Earth?

Back

The acceleration due to gravity on Earth is approximately 9.8 m/s².

Front

What is an independent variable in an experiment?

Back

An independent variable is the factor that is changed or controlled in an experiment to test its effects on the dependent variable.

Front

What force is used by a bicycle's hand brake to slow it down?

Back

The hand brake relies on friction to slow down the bicycle.

Front

What is the role of gravity in motion?

Back

Gravity is a force that pulls objects toward each other, affecting their motion and causing them to accelerate downward.

Front

What is the difference between balanced and unbalanced forces?

Back

Balanced forces do not change an object's motion, while unbalanced forces cause an object to accelerate.

Front

How does mass affect the motion of an object?

Back

The greater the mass of an object, the more force is required to change its motion.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a force.

Front

What is the formula for calculating acceleration?

Back

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