Forces and Newton's Laws Lesson Check

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by an unbalanced force.

Front

Define inertia.

Back

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

Front

What is net force?

Back

Net force is the vector sum of all the forces acting on an object.

Front

What happens to a passenger in a car when it stops suddenly?

Back

The passenger will move forward due to inertia, pressing against the seatbelt.

Front

What are unbalanced forces?

Back

Unbalanced forces are forces that cause an object to accelerate or change its motion.

Front

Give an example of Newton's Law of Inertia in everyday life.

Back

When a car suddenly stops, passengers lurch forward because their bodies want to continue moving.

Front

What is the effect of different surfaces on the acceleration of a toy car?

Back

Different surfaces can affect the speed and acceleration of a toy car due to varying friction.

Front

What is the relationship between force, mass, and acceleration?

Back

According to Newton's Second Law, force equals mass times acceleration (F=ma).

Front

What is friction?

Back

Friction is a force that opposes the motion of an object, acting parallel to the surfaces in contact.

Front

How does gravity affect objects in motion?

Back

Gravity pulls objects toward the Earth, affecting their acceleration and speed.