Newton's Laws and Forces

The words "constant speed" in a problem means

• the acceleration is 0 m/s²

• the Net Force = 0 Newtons

• All forces balance out

• all of these

Tags

NGSS.HS-PS2-1

You are driving to a birthday party with the cake sitting in the passenger's seat. You slam on your brakes to avoid hitting a deer. This causes the cake to splatter all over your dashboard and the floor of the passenger's side. Which of Newton's Laws best explains why this happens?

• Newton's First Law (Inertia)

• Newton's Second Law (Net force = mass x acceleration)

• Newton's Third Law (Action/Reaction)

• Law of Universal Gravitation

Which of Newton's Laws quantify the relationship between external forces, an objects mass, and the rate that velocity changes?

• Newton's First Law (Inertia)

• Newton's Second Law (Net force = mass x acceleration)

• Newton's Third Law (Action/Reaction)

• Law of Universal Gravitation

Tags

NGSS.MS-PS2-2

While sitting in a rolling desk chair, you push on a wall. Which of Newton's Laws explain why you move backwards (away from the wall)?

• Newton's First Law (Inertia)

• Newton's Second Law (Net force = mass x acceleration)

• Newton's Third Law (Action/Reaction)

• Law of Universal Gravitation

An object moving at a constant speed (has no acceleration). What can we accurately say about the forces on the object?

• Net Force = 0 Newtons

• There is definitely a force pushing it forward

• There is definitely a force pushing it backwards

• We can't accurately say anything without more information

Tags

NGSS.HS-PS2-1

A car with a velocity North encounters a force pushing it South. Ignoring all other factors, what will the motion of the car do?

• speed up

• slow down

• stay at a constant speed

• turn

Tags

NGSS.MS-PS2-2

A rubber ducky has a Net Force acting downward at the same time that it (the ducky) is moving downwards). The ducky will

• slow down

• speed up

• stay at a constant speed

• turn

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A force of 50 Newtons acts to the right at the same time that a 40 Newton force acts to the left. What is the net force?

• 10 Newtons

• 10

• 10 Newtons to the right

• 90 Newtons to the right

Tags

NGSS.MS-PS2-2

This force always acts opposite of motion (or intended motion)

• Gravity

• Normal

• Friction

• Tension

Mrs. Frizzle is standing on a scale that is on the magical school bus. The bus is moving straight upward with a small constant speed. If Mrs. Frizzle weighs 850 Newtons when at rest in her classroom, how much does she weigh when on the bus?

• 850 Newtons

• more than 850 Newtons

• less than 850 Newtons

Tags

NGSS.MS-PS2-4