Speed review

What is the formula to calculate speed?

• S = t/d
• S = d/t
• S = d x t
• S = t x d

A runner races in the 100 meter dash. It takes her 10 seconds to finish. What is her average speed?

• 10 m/s

• 1000 m/s

• 100 seconds

• 10 seconds

Which of the following is a unit of time?

• sec
• mi
• m/s
• km

Which of the following is a unit of speed ?

• sec
• mi
• m/s
• min

Speed -

• A measure that gives rate of change and position

• A measure that dissolves to one unit

• A measure of distance an object travels per unit of time.

• A measure of distance an object travels per unit of measurement.

Reese can run 10 meters in 5 seconds. What is her speed?

• 5 meters/sec
• 2 meters/sec
• 5 miles/hour
• 2 miles/hour

Avery likes to walk 30 feet in 10 seconds. What is her speed?

• 3 feet/sec
• 6 feet/sec
• 10 feet/sec
• 2 feet/sec

Calculate these 3 car's speeds, then rank them in order of fastest to slowest, with 3 being the fastest car and 1 the slowest car.
Car A- distance: 4 meters, time: 2 sec
Car B- distance: 2 meters, time: 2 sec
Car C- distance: 8 meters, time: 2 sec

• Car A= 1
  Car B= 2
  Car C = 3
• Car A = 2
  Car B= 1
  Car C= 3
• Car A= 3
  Car B= 1
  Car C = 2
• Car A = 3
  Car B= 2
  Car C= 1

Motion is

• a word that rhymes with ocean.

• an object's change in its speed to a reference point.

• an object's change in position to a reference point.

• an object's change in position to its rate of speed.

A vehicle travels 2345 m in 315 s toward the evening sun. What is its speed?

• 7.44 m/s

• 0.13 m/s

• 738,675 m/s

• 7.44m