Balance and unbalanced forces

What is a force?

• A push or pull on an object

• The speed of an object

• The weight of an object

• The size of an object

What happens when forces are balanced?

• The net force is zero and the object's motion does not change

• The object accelerates

• The object moves in the direction of the stronger force

• The net force is greater than zero

What is the net force when two teams in tug-of-war pull with equal force?

• Zero

• Greater than zero

• Less than zero

• Equal to the weight of the rope

What causes an object to move in the direction of the stronger force?

• Unbalanced forces

• Balanced forces

• Equal forces

• Opposite forces

How do you calculate net force when forces act in opposite directions?

• Subtract the smaller force from the larger force

• Add all forces together

• Multiply the forces

• Divide the forces

What happens to an object if the net force is zero?

• Its motion does not change

• It accelerates

• It moves in the direction of the net force

• It stops moving

What is an example of unbalanced forces?

• Pushing a toy car with more force than friction

• A book resting on a table

• A rope in a tug-of-war with equal forces

• An object moving at constant speed

What happens when the upward force applied to a box is greater than gravity?

• The box rises

• The box falls

• The box remains stationary

• The box accelerates downward

What determines the acceleration of an object?

• The magnitude of the net force

• The weight of the object

• The direction of the net force

• The size of the object

What can be predicted by analyzing forces in horizontal and vertical directions?

• The motion of an object

• The weight of an object

• The size of an object

• The speed of an object