P2.3 Forces in Action

• Forces are pushes or pulls that can cause an object to change its shape, speed, or direction of motion
• When unbalanced forces act on an object, they cause it to accelerate
• Match the concept with its description:

  Mass ↔️ Amount of matter in an object

  Acceleration ↔️ Rate of change of velocity
• Match the type of force with its effect on motion:

  Balanced forces ↔️ No change in motion

  Unbalanced forces ↔️ Change in speed, direction, or shape
• Newton's Second Law states that acceleration decreases if mass increases.


  True
• Acceleration is the rate of change of velocity
• The formula for Newton's Second Law is F = ma
• Uniform motion occurs when an object moves at a constant speed in a straight line
• Balanced forces maintain uniform motion.

  True
• In static equilibrium, an object is motionless.


  True
• Match the type of force with its effect on motion:

  Balanced ↔️ No change in motion

  Unbalanced ↔️ Changes speed or direction
• What is the relationship between force, mass, and acceleration according to Newton's Second Law?

  F = ma
• Balanced forces maintain uniform motion.

  True
• In airplane flight, balanced forces result in constant altitude and speed.


  True
• Balanced forces result in no net force and no change in an object's motion.


  True
• Match the type of force with its description:

  Balanced forces ↔️ Equal in size and opposite in direction

  Unbalanced forces ↔️ Not equal in size and/or not opposite in direction
• Newton's Second Law states that acceleration is directly proportional to force and inversely proportional to mass.


  True
• Mass is inversely proportional to force in Newton's Second Law.


  True
• In Newton's Second Law, the unit for net force is Newtons
• If a force of 10 N is applied to an object with a mass of 2 kg, the acceleration would be 5 m/s².

  True
• Match the variable in Newton's Second Law with its unit:

  F ↔️ N

  m ↔️ kg

  a ↔️ m/s²
• What type of forces result in accelerated motion?

  Unbalanced
• What is the condition for static equilibrium?

  Net force and torque are zero
• What are the two main types of forces based on their balance?

  Balanced and unbalanced
• What happens to an object when unbalanced forces act on it?

  It accelerates
• If a force of 10 N is applied to an object with a mass of 2 kg, the acceleration is 5 m/s².
• What is the key difference between static and dynamic equilibrium?

  Motion
• What force provides the centripetal force for a satellite orbiting Earth?

  Gravity
• Unbalanced forces are forces that are not equal in size and/or not opposite in direction
• Order the characteristics of balanced and unbalanced forces:

  1️⃣ Equal in size and opposite in direction

  2️⃣ No net force

  3️⃣ No change in motion

  4️⃣ Not equal in size and/or not opposite in direction

  5️⃣ Net force present

  6️⃣ Can change speed, direction, or shape
• The formula for Newton's Second Law is F = ma
• Acceleration is directly proportional to force
• Unbalanced forces result in a net force that can change an object's speed, direction, or shape
• What is the unit for mass?

  kg
• What does Newton's Second Law of Motion state about acceleration?

  Directly proportional to net force
• If a force of 10 N is applied to an object with a mass of 2 kg, the acceleration would be 5 m/s².


  True
• Order the types of motion from slowest to fastest change in velocity:

  1️⃣ Uniform Motion

  2️⃣ Circular Motion

  3️⃣ Projectile Motion

  4️⃣ Accelerated Motion
• In dynamic equilibrium, an object moves at a constant velocity
• Balanced forces result in no net force
• Unbalanced forces can change an object's speed or direction.


  True