1.3 Forces

What happens when the forces acting on an object are unbalanced?

• The object remains stationary
• The object decelerates
• The object travels at a constant velocity
• The object accelerates

What is the concept of resultant force?

• The force that causes acceleration
• The force that keeps the object stationary
• The force that keeps the object at a constant velocity
• The force that causes deceleration

What happens when the forces acting on an object are balanced?

• The object decelerates
• The object remains stationary
• The object travels at a constant velocity
• The object accelerates

What is friction force?

• A force that slows down objects
• A force that helps objects move
• A force that changes the direction of objects
• A force that changes the shape of objects

Which of the following is an example of a contact force?

• Magnetism
• Gravity
• Electromagnetic force
• Friction

What is weight?

• The force of friction on an object
• The force of drag on an object
• The force of air resistance on an object
• The force of gravity on an object

Which of the following is an example of a non-contact force?

• Gravity
• Electromagnetic force
• Magnetism
• Friction

What happens to an object's velocity if the forces acting on it are balanced?

• The object decelerates
• The object travels at a constant velocity
• The object changes direction
• The object accelerates

What is the relationship between unbalanced forces and acceleration or deceleration?

• Unbalanced forces cause acceleration
• Unbalanced forces cause the object to travel at a constant velocity
• Unbalanced forces cause deceleration
• Unbalanced forces cause the object to remain stationary

How can engineers reduce drag?

• By making vehicles heavy
• By making vehicles slow
• By making vehicles bulky
• By making vehicles smooth and streamlined