Review - Speed, Velocity, Acceleration and Momentum

If a car speeds up from rest to 30 m/s in 6 seconds, what is its acceleration? (show the work and everything that applies)

Answer explanation

30 m/s divided by 6 s = 5 m/s/s

On a highway, a truck slows from 55 mph to a stop in 12 seconds, whereas a car slows from 70 mph to a stop in 12 seconds. Which of them has greater acceleration (ignore sign)?

• Car
• Truck
• Both have same acceleration
• Both are not acclerating

Which of the following students are right about the acceleration of the bus [Select all correct answers]?

• James
• Katie
• Lisa
• Mason

Address the students who are wrong and help them understand why they are wrong (Have a separate statement for each explanation or student).

Which of the following determine the momentum of an object? [Select all correct answers]

• Acceleration
• Mass
• Velocity
• Weight

What is the total distance traveled by the student?

• 10 m
• 40 m
• 50 m
• 150 m

What is the displacement of the student?

• 50 m
• 50 m West
• 50 m East
• 150 m

What is the average speed of the student?

• 1 m/s
• 1 m/s West
• 5 m/s
• 5 m/s West

What is the displacement of the student for the return journey?

• 50 m
• 50 m West
• 50 m East
• 150 m

What is the velocity of the student for the return journey?

• 2.5 m/s
• 2.5 m/s East
• 2.5 m/s West
• 4 m/s East