Forces in Action

What is the force that opposes the motion of an object when it is in contact with another surface?

• Acceleration

• Attraction

• Friction

• Slipperiness

Which force pulls objects towards the center of the Earth?

• Gravity

• Friction

• Wind

• Magnetism

Tags

NGSS.MS-PS2-4

When you push a box across the floor, what type of force are you applying?

• Gravitational force

• Static friction

• Centripetal force

• Kinetic friction

What force pushes objects upwards when they are submerged in a fluid?

• Gravity force

• Buoyant force

• Lift force

• Compression force

Name a type of simple machine that can make work easier by changing the direction of the force.

• Wedge

• Screw

• Pulley

• Lever

What force acts against the motion of an object through the air?

• Friction

• Air resistance (drag)

• Gravity

• Inertia

Which force opposes the motion of an object through water?

• Thrust force

• Lift force

• Drag force

• Push force

According to [S-4-PS-E-02], can an object have multiple forces acting on it even when it is at rest? (Yes/No)

• Yes

• No, multiple forces cause objects to move

• No, an object can only have one force at a time

• No, forces cannot act on a stationary object

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5

How can force diagrams help in understanding the forces acting on an object?

• Force diagrams help in understanding the forces acting on an object by using colors to represent the forces.

• Force diagrams help in understanding the forces acting on an object by showing the object's velocity.

• Force diagrams help in understanding the forces acting on an object by providing detailed mathematical equations.

• Force diagrams help in understanding the forces acting on an object by visually representing the forces with arrows showing their direction and relative magnitude.

Draw a force diagram showing the forces acting on a book resting on a table.

• Force diagram should show four forces - gravitational force downwards, normal force upwards, frictional force sideways, and air resistance upwards.

• Force diagram should show three forces - gravitational force downwards, normal force upwards, and magnetic force sideways.

• Force diagram should show only one force - gravitational force downwards.

• Force diagram should show two forces - gravitational force downwards and normal force upwards.