Interactive Quizzes: Test Your Knowledge on Forces (Grade 7 Integrated Science).

📚 Quick Study Guide

• ⚖️ Force: A push or pull that can change the motion of an object. Measured in Newtons (N).
• ➡️ Net Force: The overall force acting on an object. If forces are in the same direction, add them. If they are in opposite directions, subtract them.
• ↔️ Balanced Forces: Equal and opposite forces that result in no change in motion (net force = 0).
• ↗️ Unbalanced Forces: Unequal forces that cause a change in motion (acceleration).
• 🍎 Gravity: The force of attraction between objects with mass. On Earth, the acceleration due to gravity is approximately $9.8 m/s^2$.
• friction: A force that opposes motion between surfaces in contact.
• 📐 Formula:** $F = ma$ (Force = mass x acceleration)

🧪 Practice Quiz

1. What is a force?
   1. A type of energy.
   2. A push or pull.
   3. A measure of mass.
   4. A state of equilibrium.
2. What unit is force measured in?
   1. Kilograms (kg).
   2. Meters per second (m/s).
   3. Newtons (N).
   4. Joules (J).
3. What happens when balanced forces act on an object?
   1. The object accelerates.
   2. The object changes direction.
   3. The object remains at rest or continues moving at a constant velocity.
   4. The object's mass increases.
4. What is the net force when a 10N force pulls to the right and a 5N force pulls to the left?
   1. 5N to the left.
   2. 15N to the right.
   3. 5N to the right.
   4. 15N to the left.
5. Which of the following is an example of friction?
   1. A ball rolling on a smooth surface eventually stopping.
   2. A rocket accelerating in space.
   3. A book resting on a table.
   4. A car moving at a constant speed on an icy road.
6. What does the formula $F = ma$ represent?
   1. Force equals velocity times time.
   2. Force equals mass times acceleration.
   3. Force equals weight times height.
   4. Force equals energy times distance.
7. What is the approximate acceleration due to gravity on Earth?
   1. $19.6 m/s^2$.
   2. $4.9 m/s^2$.
   3. $9.8 m/s^2$.
   4. $0 m/s^2$.