Gr 9 NATURAL SCIENCES: CH 3.1 Types of forces
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Questions and Answers

What is the unit of measurement for force?

  • meter
  • joule
  • kilogram
  • newton (correct)

What happens when an object's velocity changes over time due to a force?

  • It remains stationary
  • It accelerates (correct)
  • It decelerates
  • It displaces

What is the result of balanced forces acting on an object?

  • The object decelerates
  • The object accelerates
  • The object remains stationary (correct)
  • The object moves in one direction

What is the term for the rate at which an object's velocity changes over time?

<p>Acceleration (B)</p> Signup and view all the answers

What happens when one object exerts a force on another?

<p>The second object exerts an equal and opposite force (D)</p> Signup and view all the answers

What is the term for the combined effect of multiple forces acting on an object?

<p>Net force (B)</p> Signup and view all the answers

How are forces typically represented?

<p>Using arrows (B)</p> Signup and view all the answers

What does the direction of the arrow represent in a force diagram?

<p>The direction of the force (A)</p> Signup and view all the answers

What is the net force in the scenario where Jabu pulls Rod's arm with a force of 10 N to the left and Viantha pulls Rod's other arm with a force of 6 N to the right?

<p>4 N to the left (C)</p> Signup and view all the answers

What is used to measure forces?

<p>Spring balance (A)</p> Signup and view all the answers

What is the relationship between the distance a spring moves and the force applied, according to Hooke's Law?

<p>The distance is directly proportional to the force (A)</p> Signup and view all the answers

Which type of force is an example of a contact force?

<p>Frictional force (B)</p> Signup and view all the answers

Which type of force is an example of a non-contact force?

<p>Magnetic force (B)</p> Signup and view all the answers

What is an example of an object exerting a force on another object without touching?

<p>Magnets (C)</p> Signup and view all the answers

Why is it important to understand the types of forces and how they interact?

<p>To understand the principles of motion (D)</p> Signup and view all the answers

What is the effect of a force on an object's motion?

<p>It changes the direction of the object (A), It increases or decreases the speed of the object (B)</p> Signup and view all the answers

What is the result when the forces acting on an object are unequal?

<p>The object moves in the direction of the greater force (A)</p> Signup and view all the answers

What is the name of the law that states when one object exerts a force on another, the second object exerts an equal and opposite force?

<p>Newton's Third Law of Motion (C)</p> Signup and view all the answers

What happens when a force is applied to an object, changing its shape?

<p>The object deforms (A)</p> Signup and view all the answers

What is the term for the speed and direction of a moving object?

<p>Velocity (C)</p> Signup and view all the answers

What happens when two forces of equal size but opposite direction act on an object?

<p>The object remains stationary (A)</p> Signup and view all the answers

What is the purpose of using arrows to represent forces?

<p>To show the direction and magnitude of the force (D)</p> Signup and view all the answers

When measuring force using a spring balance, what determines the distance the spring moves?

<p>The size of the force applied (B)</p> Signup and view all the answers

What is the difference between contact forces and non-contact forces?

<p>Contact forces require physical contact, non-contact forces do not (A)</p> Signup and view all the answers

What is the net force direction in the scenario where Jabu pulls Rod's arm with a force of 8 N to the left and Viantha pulls Rod's other arm with a force of 4 N to the right?

<p>To the left (B)</p> Signup and view all the answers

Which of the following is an example of a force that can act over long distances?

<p>Gravitational force (D)</p> Signup and view all the answers

What is the purpose of understanding the types of forces and how they interact?

<p>To better grasp the principles governing motion and the effects of different forces (C)</p> Signup and view all the answers

What does the length of the arrow in a force diagram represent?

<p>The magnitude of the force (C)</p> Signup and view all the answers

Which of the following is an example of a force that requires physical contact?

<p>Frictional force (B)</p> Signup and view all the answers

What is the result of combining forces of 3 N to the left and 2 N to the right?

<p>A net force of 1 N to the left (C)</p> Signup and view all the answers

What is the primary purpose of understanding the different types of forces?

<p>To grasp the principles governing motion and the effects of different forces in various scenarios (A)</p> Signup and view all the answers

Which of the following forces would not be considered a contact force?

<p>Gravitational force (A)</p> Signup and view all the answers

What is the key difference between contact and non-contact forces?

<p>Contact forces require physical contact, while non-contact forces do not (C)</p> Signup and view all the answers

According to Hooke's Law, what is the relationship between the force applied to a spring and its resulting movement?

<p>The distance a spring moves is directly proportional to the force applied (C)</p> Signup and view all the answers

What is the correct way to calculate the net force acting on an object?

<p>Add the forces acting in one direction and subtract the forces acting in the opposite direction (B)</p> Signup and view all the answers

What is an example of an object exerting a force on another object without physical contact?

<p>A magnet attracting a paper clip (C)</p> Signup and view all the answers

Why do we use arrows to represent forces in diagrams?

<p>To indicate the direction and magnitude of the force (B)</p> Signup and view all the answers

What determines the direction of the net force acting on an object?

<p>The combination of forces acting in one direction and subtracting the forces acting in the opposite direction (D)</p> Signup and view all the answers

What happens when an object's velocity changes over time due to a force, and its acceleration is zero?

<p>The object's velocity remains constant (A)</p> Signup and view all the answers

What is the result of an object exerting a force on another object without touching, according to Newton's Third Law of Motion?

<p>The second object exerts an equal and opposite force on the first object (D)</p> Signup and view all the answers

What is the net force when multiple forces act on an object, and their combined effect is zero?

<p>Zero, because the forces are balanced (A)</p> Signup and view all the answers

What happens when a force is applied to an object, and its shape changes, but its motion remains constant?

<p>The force is only acting on the object's shape (A)</p> Signup and view all the answers

What is the direction of the net force when an object is moving in a circular path?

<p>Radial to the circular path (D)</p> Signup and view all the answers

What is the result of combining forces of 5 N to the left and 3 N to the right?

<p>A net force of 2 N to the left (A)</p> Signup and view all the answers

What is the relationship between the force applied to an object and its resulting acceleration?

<p>The force is directly proportional to the acceleration (C)</p> Signup and view all the answers

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