Balloon Car Challenge

What is the formula for finding average speed?

• F=ma
• S=dt
• S=d/t
• T=d/s

Marie Ann is trying to predict the time required to ride her bike to the nearby beach. She knows that the distance is 45 km and, from other trips, that her average speed is about 20 km/h. Predict how long the trip will take.

• 2.25 hours
• 2 hours
• 3 hours
• 3.25 hours

Keri rollerblades to school, a total distance of 4.5 km. She has to slow down twice to cross busy streets, but overall the journey takes her 0.65 h. What is Keri's average speed during the trip?

• 6 km/h
• 7 km/h
• 6.923 km/h
• 7.923 km/h

If you move 50 meters in 10 seconds, what is your speed?

• 500 m/s
• 50 m/s
• 10 m/s
• 5 m/s

It takes Serina 0.25 hours to drive to school. Her route is 16 km long. What is Serina’s average speed on her drive to school?

• 4 km/h
• 0.015625 km/h
• 64 km/h
• 50 km/h

If a car travels 400 m in 20 seconds how fast is it going?

• 20 m/s
• 80 m/s
• 800 m/s
• 200 m

Which of the following is NOT an important part of the engineer design process?

• money
• failure
• brainstorming
• test prototype

In the balloon car challenge what represented the axels?

• straw
• wooden skewers or pencils
• balloon
• rubber band

What was the purpose of the balloon in the balloon car challenge?

• stability
• pressure
• balance
• power

Which part represented the body of the car in the balloon car challenge?

• foam tray
• balloon
• wooden skewers or pencils
• bottle caps