Velocity, Acceleration, Graphs

1. Which of the following statements about speed and velocity is correct?

• Velocity only describes an object’s rate of motion.
• Speed describes how an object is changing its velocity.
• Speed and velocity both describe how an object is speeding up.
• Only velocity includes the direction an object is traveling.

65mi/hr South is an example of...

• Speed
• Velocity
• Acceleration
• Direction

Find the velocity of a plane that traveled 3000 miles west in 5 hours.

• 65 mph

• 600 mph

• 600 mph west

• 600 mph

Describe the speed of the object from 4-6 seconds using the distance vs. time graph.

• Increasing speed
• Decreasing speed
• Not moving
• Constant speed

A stopped car begins moving and reaches a speed of 25m/s in 5 seconds. What is its acceleration?

• +25m/s²

• -0m/s²

• +5m/s²

• 5m/s

A helicopter flies west 200 miles in 2 hours. What is its velocity?

• 99 mph

• 100 mph south

• 400 mph south

• 297 mph south

If you travel 7.5 km and walk for 1.5 h, what is your average speed?

• 5 km/h
• 11.25 km/h
• 0.2 km/h

What two things must you know to determine speed?

• distance and direction

• direction and time

• speed and direction

• time and distance

Which of the following is an example of potential energy?

• A glass jar sitting on a shelf

• A flag waving in the wind

• A ball rolling along the sidewalk

• A battery powering a radio

Acceleration of an object happens when things ________

• slow down
• go faster
• change direction (turn)
• All of the above