Unit 3 Practice For Test

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; the greater the mass, the greater the inertia.

Front

Why does an 18-wheeler truck have more inertia than a bicycle?

Back

An 18-wheeler truck has more inertia than a bicycle because it has more mass.

Front

What happens to an object in motion if no net force acts on it?

Back

If no net force acts on an object in motion, it will continue to move at a constant velocity.

Front

What is the relationship between mass and acceleration?

Back

According to Newton's second law, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F = ma).

Front

What is equilibrium in physics?

Back

Equilibrium occurs when the net force acting on an object is zero, resulting in no acceleration. An object in equilibrium can be at rest or moving at a constant velocity.

Front

What is the principle of action and reaction?

Back

The principle of action and reaction states that for every action, there is an equal and opposite reaction. This means that forces always occur in pairs.

Front

How does mass affect the change in velocity when two objects push off each other?

Back

When two objects push off each other, the object with less mass will experience a greater change in velocity compared to the object with more mass.

Front

What does it mean for an object to accelerate?

Back

To accelerate means to change the velocity of an object, which can involve speeding up, slowing down, or changing direction.

Front

What is constant velocity?

Back

Constant velocity means that an object is moving at a fixed speed in a straight line, with no changes in direction or speed.

Front

What is the formula for calculating force?

Back

The formula for calculating force is F = ma, where F is force, m is mass, and a is acceleration.