Force and Motion

What is the unit of force?

• Pound (lb)

• Newton (N)

• Kilogram (kg)

• Joule (J)

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

• Force = Mass + Acceleration

• Force = Mass / Acceleration

• Force = Mass x Acceleration

• Force = Acceleration - Mass

What is the difference between mass and weight?

• Mass is the amount of matter in an object, while weight is the force of gravity acting on that mass.

• Mass is the force of gravity acting on an object, while weight is the amount of matter in that object.

• Mass and weight are the same and can be used interchangeably.

• Weight is the measure of an object's volume, while mass is the measure of its density.

What is inertia?

• The tendency of an object to resist changes in its state of motion.

• The force that causes an object to accelerate.

• The speed of an object in a straight line.

• The mass of an object multiplied by its velocity.

What is Newton's First Law of Motion?

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

• An object will accelerate in the direction of the net force acting on it.

• For every action, there is an equal and opposite reaction.

• An object in motion will eventually come to a stop without any external force.

What is a force?

• A push or pull on an object that can cause it to change its velocity.

• A type of energy that can be stored in objects.

• A measure of the mass of an object.

• A reaction that occurs when two objects collide.

What is a vector quantity?

• A quantity that has only magnitude, such as mass or temperature.

• A quantity that has both magnitude and direction, such as force or velocity.

• A quantity that is always positive, such as distance.

• A quantity that can be measured in terms of time, such as speed.

What is friction?

• A force that opposes the motion of objects that touch as they move past each other.

• A type of energy that is released during motion.

• A measure of how fast an object can move without stopping.

• A force that accelerates objects in the same direction.

What happens if an unbalanced force acts on a moving ball?

• The ball will continue moving at a constant speed.

• The ball will accelerate in the direction of the force.

• The ball will come to a complete stop.

• The ball will change direction randomly.

If a man and a ball travel 90 m in 9 seconds, what is their average speed?

• 5 m/s

• 8 m/s

• 10 m/s

• 12 m/s