Let's solve each question using the provided word bank:
Word Bank:
acceleration, equilibrium, machine, force, power, inertia, work, velocity
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1. A ________ is a device that makes work easier to do.
✔ Answer: machine
Explanation: A machine is any device that helps make work easier by changing the magnitude or direction of a force.
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2. When all forces acting on an object balance each other, the object is said to be in a state of ________.
✔ Answer: equilibrium
Explanation: Equilibrium occurs when the net force on an object is zero, meaning all forces cancel out and the object does not accelerate.
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3. ________ is done when force moves an object.
✔ Answer: work
Explanation: In physics, work is defined as force applied over a distance. The formula is: Work = Force × Distance (when force is in the direction of motion).
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4. ________ is the rate at which work is done.
✔ Answer: power
Explanation: Power measures how quickly work is performed. Formula: Power = Work / Time.
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5. An object resists a change in motion because of ________.
✔ Answer: inertia
Explanation: Inertia is the tendency of an object to resist changes in its state of motion. It's directly related to mass—the more mass, the greater the inertia.
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6. The ________ of a moving object describes its speed and direction.
✔ Answer: velocity
Explanation: Velocity is a vector quantity that includes both speed and direction. Speed alone is scalar; velocity gives full motion information.
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7. Gravity is a ________ that pulls objects toward the center of the earth.
✔ Answer: force
Explanation: Gravity is a fundamental force of nature that attracts objects with mass toward each other. On Earth, it pulls objects downward.
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8. ________ is the rate at which velocity changes.
✔ Answer: acceleration
Explanation: Acceleration is the change in velocity per unit time. It can involve speeding up, slowing down, or changing direction.
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Final Answers:
1.
machine
2.
equilibrium
3.
work
4.
power
5.
inertia
6.
velocity
7.
force
8.
acceleration
✔ All words from the bank are used exactly once.
Parent Tip: Review the logic above to help your child master the concept of 5th grade science forces in motion.
