Forces and Simple Machines Quiz

What is a force?

• A push or pull on an object

• The speed of an object

• The mass of an object

• The volume of an object

How are forces measured?

• In meters

• In kilograms

• In newtons

• In liters

What is the difference between balanced and unbalanced forces?

• Balanced forces cause motion, unbalanced forces do not

• Balanced forces do not cause motion, unbalanced forces do

• Balanced forces are always equal, unbalanced forces are not

• Balanced forces are always unequal, unbalanced forces are equal

What is inertia?

• The tendency of an object to resist a change in motion

• The force that pulls objects toward the Earth

• The speed of an object in a particular direction

• The amount of matter in an object

What is friction?

• The force that opposes motion between two surfaces that are in contact

• The force that pulls objects toward the Earth

• The force that pushes objects away from each other

• The force that keeps objects at rest

What effect does friction have on motion?

• It speeds up motion

• It slows down motion

• It has no effect on motion

• It changes the direction of motion

What is gravity?

• The force that opposes motion

• The force that pulls objects toward the Earth

• The force that pushes objects away from each other

• The force that keeps objects at rest

What is the difference between mass and weight?

• Mass is the amount of matter in an object, weight is the force of gravity on an object

• Mass is the force of gravity on an object, weight is the amount of matter in an object

• Mass and weight are the same

• Mass is measured in newtons, weight is measured in kilograms

What is terminal velocity?

• The maximum speed an object reaches when falling through a fluid

• The speed at which an object starts to fall

• The speed at which an object stops falling

• The speed at which an object changes direction

What are the four forces acting on an aeroplane?

• Lift, weight, thrust, and drag

• Lift, weight, friction, and gravity

• Thrust, drag, friction, and gravity

• Thrust, drag, inertia, and gravity