Forces and Motion

What is the scientific unit for force?

• meters per second

• meters per second squared

• Newton

• meters

A rocket launching into space is a good example of which of Newton's Laws?

• Law of Inertia

• Law of Acceleration

• Law of Action-Reaction

An object in motion stays in motion, and an object at rest stays at rest unless acted on by an external force

• Law of Inertia

• Law of Acceleration

• Law of Action-Reaction

Which of the following is the best example of Newton's Law of Inertia (Law 1)?

• A car hitting a wall versus a plane hitting a wall

• A bird pushing it's wings down and the air pushing back up on the bird.

• A boy riding on a bike and flying over the handlebars when he hits a rock

• A person sitting in a chair

A contact force that resists the sliding motion between two objects that are touching.

• friction

• normal force

• non-contact force

• gravity

As mass of two objects increases, gravity...

• Decreases

• Increases

• Stays the same

Tags

NGSS.MS-PS2-4

Select which answers are examples of contact forces (select more than one)

• magnetism

• applied force

• friction

• gravity

What is the scientific unit for acceleration?

• meters per second

• Newtons

• meters per second squared

• meters

As distance between two objects increases, gravity...

• increases

• decreases

• stays the same

More force is required to push a full grocery cart through the store rather than an empty cart. Which of Newton's Laws explains this?

• Law of Inertia

• Law of Acceleration

• Law of Action-Reaction

Tags

NGSS.MS-PS2-2