Turn potential energy into kinetic energy
Build a simple ramp and release toy cars or marbles to observe how stored potential energy converts into kinetic energy through speed and motion.
About this activity
Build a simple ramp and release toy cars or marbles to observe how stored potential energy converts into kinetic energy through speed and motion.
What you need
Step by step
- 1
Step 1
Gather all the materials listed above and bring them to your workspace.
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Step 2
Find a flat spot on the floor to build your ramp.
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Step 3
Clear the area of toys and small items so the ramp has room.
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Step 4
Prop one end of the cardboard or board on the stack of books to make a sloping ramp.
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Step 5
Tape the ramp to the books or floor so it will not slip during your test.
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Step 6
Place the towel or cushion at the bottom of the ramp as a soft landing spot.
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Step 7
Use the tape to make a start line at the top of the ramp and a finish line at the bottom.
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Step 8
Put your toy car or marble on the start line without pushing it.
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Step 9
Release the toy and let it roll down the ramp on its own.
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Step 10
Repeat the release two more times from the same start line.
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Step 11
After each run write one short note on your paper about how fast or how far the toy went.
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Step 12
Add one more book under the ramp to raise the height and tape it again if needed.
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Step 13
Repeat three releases from the same start line at the new height.
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Step 14
Write one sentence comparing whether the toy went faster or further from the higher ramp.
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Step 15
Share a photo or video and a short note about your experiment and what you learned on DIY.org
Fun facts
How do I build a simple ramp to show potential energy turning into kinetic energy?
To do the activity, set up a board or stiff cardboard as a ramp by propping one end on books or a box. Mark a consistent starting line near the top, place a toy car or marble there, and release without pushing so gravity does the work. Measure how far or how fast it goes with a tape or stopwatch. Repeat after changing ramp height, angle, or surface to compare how potential energy converts to kinetic energy.
What materials do I need to build a ramp for toy cars or marbles?
You'll need a flat board or piece of stiff cardboard, books or boxes to prop the ramp, toy cars or marbles, and tape or clips to keep the ramp steady. Add a ruler or tape measure and a stopwatch to record distance and time. Optional: protractor to measure angle, different ramp coverings (sandpaper, fabric) to test friction, and a towel or soft mat at the bottom to catch fast marbles.
What ages is this ramp experiment suitable for?
This experiment suits toddlers to teens with adjusted supervision and complexity. Ages 3–5 enjoy rolling cars with adult help to prevent choking hazards. Ages 6–8 can change ramp height and record distances. Ages 9+ can design fair tests, measure angles, calculate speed, and compare variables. Always supervise younger children, keep small marbles away from under-3s, and match tasks to fine-motor and attention skills.
What safety tips should I follow for a ramp and car/marble experiment?
Always supervise children, especially when marbles or small cars are used—keep under-3s away from small pieces. Secure the ramp so it won’t slip or collapse; use tape or clamps. Place a soft mat or box at the end to stop fast-moving toys safely. Clear the area of tripping hazards and never aim ramps at people or pets. Teach children to release objects without pushing and to wear eye protection if launching is vigorous.
Watch & Learn
Need help?
What can we use if we don't have a cardboard or board ramp, a stack of books, or tape?
Use a sturdy shoebox lid or wooden plank instead of cardboard/board, a small stool or a stack of phone books instead of the books, and a non-slip mat or heavy book weights in place of tape to keep the ramp from slipping.
The ramp keeps slipping or my toy veers off—what should I check and fix?
If the ramp slips, press the tape firmly to the books and floor or tuck a towel under the base for grip, and if the toy veers, straighten the ramp edges or make a shallow guide line with tape so the car or marble rolls straight.
How can I adapt this ramp activity for younger kids or older kids?
For younger children, use fewer books to make a gentler slope, swap the marble for a large ball and have an adult handle the taping step, while older kids can raise the ramp higher, use a stopwatch and ruler to time and measure each run, and record results on the paper.
What are simple ways to extend or personalize the experiment after the basic runs?
Test different ramp surfaces like sandpaper or felt, try multiple toys (toy car, marble, LEGO vehicle), mark and measure run distances on your paper and graph how adding one more book changes speed, then share a photo or video and your note on DIY.org.