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8th grade Solve for speed, distance or time worksheet

6 printable versionsBuilding Confidence10 questions · answer keyFree · no account

Level: Building Confidence · On Level · Challenge Me

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Solve for speed, distance or time

Grade 8 Science Worksheet - Building Confidence

NameDate

Circle the best answer, or write your answer on the line.

  1. Ari's toy car rolls at a steady speed. Using the point (4 s, 12 m) on its graph, how far does it roll in 10 s?

  2. Bo rides a scooter at a steady speed. Using the point (5 s, 20 m) on the graph, how far does the scooter go in 8 s?

  3. What is the object doing from 2 s to 4 s on the graph, Jun?

    • Moving forward, but very slowly indeed
    • Stopped: its distance stays at 10 m
    • Moving back toward the start at a slow pace
    • Moving along at a steady 10 m/s, since the line is at 10

  4. What does the falling line from 4 s to 8 s show, Luz?

    • The object is moving away from the start more slowly
    • The object is coming back toward the start at 4 m/s
    • A speed of 0 m/s, since it ends at 0 m
    • The object is slowing down to a stop

  5. Read this first

    Two readings (example data)

    readingtime (s)distance from start (m)
    first220
    second1060

  6. Milo's bike rides at a steady speed past a marker. Using the two readings, what is the bike's speed?

  7. A lab cart rolls at a steady speed along a track. Noah records two readings. What is the cart's speed?

  8. Pia's toy boat drifts at a steady speed across a pond. Using the two readings, what is its speed?

  9. Two cars each travel at 20 m/s, one heading north and one heading east. How do their speeds and velocities compare, Ren?

    • Same speed, different velocities, since directions differ
    • Same speed and the same velocity, since both are 20 m/s
    • Same velocity, since velocity is just how fast each car goes
    • Different speeds, since the two cars head in different ways

  10. Tala rolls a ball 12 m east, and it rolls 12 m back west, in 8 s in all. What are its average speed and average velocity?

    • Speed 0 m/s and velocity 0 m/s, since it ends where it began
    • Speed 1.5 m/s and velocity 1.5 m/s, since 12 m takes 8 s
    • Speed 3 m/s and velocity 3 m/s east, since it moved 3 m each second
    • Speed 3 m/s and velocity 0 m/s, since it ends where it began

  11. A car drives around a circular track at a steady 15 m/s. Is the car's velocity steady, Zee?

    • Yes, since its speed is steady, the velocity is steady too
    • Yes, since it stays on the same track the whole way
    • No, since its speed keeps changing as it goes around
    • No: speed is steady, but the direction keeps changing
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8th grade Solve for speed, distance or time worksheet – printable
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About this worksheet

Solve for speed, distance or time. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

  • I can find how far something goes from a point on its graph, and the speed between two readings that do not start at zero (change in distance ÷ change in time).
  • I can read a distance-time graph: a flat piece is a stop, a falling piece is coming back, and the steepest piece is the fastest.
  • I can change km/h to m/s and use it to find a time, and I can find an average speed as total distance ÷ total time, with stops counted.
  • I can compare two rates written in different units, and work out when two moving things meet or when one catches the other.
  • I can say when one number (an average, or one run) hides a change in speed or a spread in the data.

Standard: supports MS-PS2-2

Words to know

speed: How far something goes each second (or hour)

velocity: Speed together with the direction of motion

average speed: Total distance divided by total time, rests included

distance-time graph: Time across, distance from the start up; steeper means faster

m/s, km/h: Meters each second; kilometers each hour (divide km/h by 3.6 for m/s)

Common mistakes

Your child stopped at the speed. The question asks how far the object goes, so multiply the speed by the time.

Your child added the extra seconds to the distance. A steady speed adds the same meters every second, so multiply.

Your child divided the later distance by the later time. When the first reading is not zero, use the change in distance over the change in time.

Questions parents ask

What is the most common mistake with solve for speed, distance or time?

Your child stopped at the speed. The question asks how far the object goes, so multiply the speed by the time.

Are these 8th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

More grade 8 science

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