Unit 7: Motion

What is motion?

• A change in an object's position

• The gravity that allows us to move

• IDK

• Moving

What is speed?

• The distance an object travels in a specific amount of time.

• The motion that has speed.

• Lighting McQueen

• Me

How can you mathematically represent speed?

• Speed = distance/time

• You cant

• Speed = V_f -V_i/time

• By seeing how fast a car can go

In which situation is the acceleration of the car negative?

• The velocity of a car was 75 km/h over 4 hours.

• The velocity of a car was 45 km/h at 2:00 pm and at 4:00 pm the velocity of the car was 85 km/h.

• The velocity of a car increased from 40 km/h to 75 km/h over 15 minutes.

• The velocity of a car is reduced from 50 km/h to 35 km/h over one minute.

A car accelerates from 10 m/s to 22 m/s in 6 seconds. What is the car’s average acceleration?

• -2 m/s²

• 12 m/s2

• -12 m/s2

• 2 m/s2

A truck was traveling at 24 m/s in came to a stop in 8 seconds. What was the truck’s average acceleration over that time period?

• -3 m/s2

• 2 m/s2

• 3 m/s2

• 16 m/s2

Assume this is an acceleration graph, where the X axis represents time in seconds and the Y axis represent velocity in m/s. Which statement BEST describes the acceleration represented by the graph?

• There is no acceleration.

• Acceleration is positive but decreasing.

• Acceleration is negative.

• Acceleration is positive and increasing.

A car's position in relation to time is plotted on the graph. What can be said about the car during segment C?

• The car travels for 100 seconds total during segment C.

• The car has come to a stop and has zero velocity.

• The car is traveling away from it’s starting position during segment C.

• The car is traveling back to it’s starting position during segment C.

Which of the following is not qualifying criteria for an object to be considered as accelerating?

• speeding up

• slowing down

• constant velocity

• changing directions

A car's position in relation to time is plotted on the graph. What can be said about the car during segment B?

• The car travels for 80 seconds during segment B.

• The car has come to a stop and has zero velocity.

• The car is traveling faster during segment B than in segment C.

• The car is traveling with a constant velocity due to the flat line of the graph.