Forces and Motion

Front

What two things do you need to know to calculate the speed of an object?

Back

Distance and time.

Front

Which requires more force: pushing a bowling ball or a tennis ball, and why?

Back

The bowling ball because it has a greater mass.

Front

What is the formula to find the speed of an object?

Back

S = D/T (Speed = Distance/Time).

Front

If a person travels 20 miles in 2 hours, what is their speed?

Back

10 mph.

Front

What is defined as any change in an object's speed or direction?

Back

Acceleration.

Front

What is the difference between balanced and unbalanced forces?

Back

Balanced forces do not change an object's motion; unbalanced forces do.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion.

Front

What is the unit of force?

Back

Newton (N).

Front

What is mass?

Back

Mass is the amount of matter in an object, usually measured in kilograms (kg).

Front

What is the relationship between mass and acceleration in Newton's second law?

Back

Force = Mass x Acceleration (F = m x a).