Question

name:
forces & motion
directions: write the force words that complete each sentence
push pull gravity friction force
inertia machine energy balance newton

1. the greater the _______________ the easier the object will move.
2. to do the job in less time and with less energy, use a _______________
3. that rock will roll down the hill due to the force of _______________
4. to make something _______________ both ends need to have the

same weight.

1. it takes _______________ to get a job done.
2. _______________ 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.

1. it would be more difficult to_______________ a wagon if it didnt have

wheels.

1. if you have a few people _______________ on the rope, the box will be

easier to move.

1. _______________s theories on motion are still believed correct today.
2. we added wheels to our bureau to create less _______________

when we move it.

Explanation:

1. According to Newton's second law \(F = ma\) (force = mass × acceleration), a greater force makes an object move more easily.
2. A machine can reduce the effort (time and energy) needed to do work.
3. Gravity is the force that causes objects to fall or roll down (like a rock on a hill).
4. For something to be balanced, both ends need equal weight (related to torque balance concept).
5. Energy is required to perform work (get a job done).
6. Inertia is the property described (an object's tendency to maintain its state of motion or rest).
7. Without wheels, friction would be higher, making it harder to pull a wagon (wheels reduce friction).
8. Pulling on a rope (applying a pull force) helps move the box.
9. Newton's theories on motion (like his three laws) are still valid.
10. Wheels reduce friction (rolling friction is less than sliding friction).

Answer:

1. force
2. machine
3. gravity
4. balance
5. energy
6. inertia
7. pull
8. pull
9. Newton
10. friction