Here is the completed worksheet with the correct force-related words filled in, along with explanations for each answer:
---
1. The greater the _force_ the easier the object will move.
✔ Explanation: Force is a push or pull that can cause an object to accelerate. Greater force applied to an object makes it easier to overcome inertia and start moving.
---
2. To do the job in less time and with less energy, use a _machine_.
✔ Explanation: Simple machines (like levers, pulleys, wheels) help us do work more efficiently — they reduce the amount of effort (energy) needed or allow us to complete tasks faster.
---
3. That rock will roll down the hill due to the force of _gravity_.
✔ Explanation: Gravity is the force that pulls objects toward the center of the Earth. It causes objects like rocks to roll downhill.
---
4. To make something _balance_ both ends need to have the same weight.
✔ Explanation: Balance occurs when forces on either side are equal — for example, in a seesaw, equal weight on both sides creates equilibrium.
---
5. It takes _energy_ to get a job done.
✔ Explanation: Energy is the capacity to do work. Any physical task requires energy to apply force over a distance.
---
6. _Inertia_ is the idea that something in motion will remain in motion, and something at rest will remain at rest, unless affected by an outside source.
✔ Explanation: This is Newton’s First Law of Motion — inertia describes an object’s resistance to changes in its state of motion.
---
7. It would be more difficult to _push_ a wagon if it didn’t have wheels.
✔ Explanation: Without wheels, friction between the wagon and the ground increases dramatically, making it harder to push.
---
8. If you have a few people _pulling_ on the rope, the box will be easier to move.
✔ Explanation: Pulling is a type of force. More people pulling means more total force applied, which helps overcome friction and inertia to move the box.
---
9. _Newton_’s theories on motion are still believed correct today.
✔ Explanation: Sir Isaac Newton formulated the three laws of motion, which form the foundation of classical mechanics and are still valid for most everyday situations.
---
10. We added wheels to our bureau to create less _friction_ when we move it.
✔ Explanation: Wheels reduce friction by replacing sliding motion with rolling motion, which requires less force to move heavy objects.
---
✔ Final Answer Key:
1. force
2. machine
3. gravity
4. balance
5. energy
6. inertia
7. push
8. pulling
9. Newton
10. friction
---
Let me know if you’d like a printable version or further explanations!
Parent Tip: Review the logic above to help your child master the concept of forces worksheet.
