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Ramps, Speed, and Motion Changes

Physical Science — Forces & Motion | Unit 1, Lesson 3 of 6

📚 Grade: 5th Grade⏱️ Duration: 45–60 minutes🔬 Subject: Physical Science — Forces & Motion
🛝🚗
Changing ramp steepness changes how gravity affects motion.
📋 NGSS Standard:
5-PS2-1 — Support an argument that the gravitational force exerted by Earth on objects is directed down.

🎯 Learning Objective

Students will test how ramp steepness changes motion and explain the role of gravity.

💡 The Big Idea

A steeper ramp lets gravity change motion more strongly, which can make an object speed up more.

🔬 The Science

Science Snapshot
ramp angleforce along rampspeed changesdistance / collision outcome
Ramp shape and surface work together to affect speed and motion change.

What is happening?

Ramps change motion by providing a pathway where gravity can speed an object up or where surfaces and shape can slow it down. The steepness of the ramp affects how strongly gravity changes the object’s motion along the slope.

Why it works that way

A steeper ramp usually leads to faster acceleration because more of gravity’s pull acts along the ramp. Surface texture and wheel or slider design also matter because friction can reduce speed.

Look for this in the lesson

Students should compare one variable at a time, such as ramp height or surface type. The lesson gets better when they explain why a steeper or smoother path changes the result.

Ask while you read: Which matters more in your test: the slope, the surface, or both working together?

📦 Materials

🏠 Household Items to Gather

📋 Printables

🧪 Investigation

Step 1 — Build two ramps (10 min)
Create one low ramp and one steeper ramp.
Step 2 — Release the same object (10 min)
Let the object go from the top of each ramp without pushing it.
Step 3 — Measure the distance (10 min)
Record how far the object traveled after each test.
Step 4 — Compare patterns (10 min)
Students identify which ramp changed the motion more.
Step 5 — Explain why (10 min)
Use gravity and steepness to explain the results.

💬 Discussion Questions

Which ramp changed the motion more?The steeper ramp usually caused a bigger change.
Why should you use the same object for both tests?It helps make the comparison fair.
How did gravity affect the results?Gravity pulled the object down the ramp in both tests.

🚀 Extensions

Extension: Test three ramp heights and graph the distance traveled.

👩‍🏫 Parent/Teacher Notes

Teaching move: Let students use either “went faster” or “traveled farther” as evidence, depending on what is easiest to observe in the home setup.

Student Worksheet

Name: ________________________     Date: ________________________

1️⃣ Compare the ramps

RampWhat happened?Distance traveled
Low ramp
Steep ramp

2️⃣ Which ramp changed the motion more? Why?

🔑 PARENT ANSWER KEY — Detach before giving worksheet to students

Sample Explanation

The steeper ramp usually made the object move faster or farther because gravity changed its motion more strongly along the ramp.

✅ What Success Looks Like