4/13 DO NOW

What does a flat (horizontal) line on a distance-time graph represent?

• The object is speeding up

• The object is slowing down

• The object is not moving

• The object is moving at a constant speed

Newton's First Law states that an object at rest will remain at rest unless acted upon by what?

• Gravity only

• An unbalanced force

• Friction only

• A balanced force

Which of the following is a correct example of Newton's Third Law?

• A ball rolling down a hill speeds up due to gravity

• A rocket pushes gas downward, and the gas pushes the rocket upward

• A moving car slows down when the brakes are applied

• A book stays on a table because no forces act on it

Tags

NGSS.MS-PS2-1

On a distance-time graph, what does a straight line going upward (with a positive slope) tell us about the object's motion?

• The object is accelerating

• The object is decelerating

• The object is moving at a constant speed

• The object is stationary

A soccer ball is rolling across a smooth floor and eventually stops. Which of Newton's laws best explains why the ball stopped, and what force caused it?

• Newton's Second Law; gravity pulled the ball down

• Newton's Third Law; the floor pushed back on the ball

• Newton's First Law; friction acted as an unbalanced force to stop the ball

• Newton's First Law; the ball had no forces acting on it

This graph shows

• An object stopped
• An object slowing down
• An object speeding up
• An object moving at constant speed

Tags

NGSS.MS-PS3-1

This graph shows 

• An object stopped
• An object speeding up
• An object slowing down
• An object moving at constant speed

Tags

NGSS.MS-PS3-1