Understanding Acceleration and Motion

The lesson covers the concept of motion, explaining how it is determined by a change in position. It introduces key terms such as speed, velocity, and acceleration, and explains their differences and relationships. The lesson also covers how to calculate speed and acceleration, with examples provided for better understanding. The session concludes with a review of the main concepts discussed.

What is necessary to determine if an object is in motion?

• A change in color

• A change in position

• A change in size

• A change in temperature

How is average speed calculated?

• Time divided by distance

• Speed divided by distance

• Distance divided by time

• Distance multiplied by time

What is the difference between speed and velocity?

• Speed is always greater than velocity

• Velocity includes direction, speed does not

• Speed includes direction, velocity does not

• Velocity is always greater than speed

Which of the following can cause a change in velocity?

• Change in color

• Change in direction

• Change in temperature

• Change in mass

What is acceleration?

• A change in direction over time

• A change in velocity over time

• A change in distance over time

• A change in speed over time

What is positive acceleration?

• When an object is slowing down

• When an object is speeding up

• When an object is changing direction

• When an object is at rest

How is acceleration calculated?

• Time divided by distance

• Distance divided by time

• Final velocity minus initial velocity divided by time

• Initial velocity minus final velocity divided by time

In the example of the skater, what was the initial velocity?

• 12 m/s

• 6.7 m/s

• 1 m/s

• 0 m/s

What is the unit of acceleration?

• m/h

• km/h

• m/s

• m/s²

What does a negative acceleration indicate?

• The object is at rest

• The object is speeding up

• The object is slowing down

• The object is changing direction