Forces in Balance and Motion

What is a balanced force?

• Forces that cause a change in the motion of an object

• Forces that are equal in size but opposite in direction

• Forces that are unequal in size and cause an object to move

• Forces that cancel each other out because they are identical

If two teams are playing tug of war and the rope does not move, what can we say about the forces?

• The forces are unbalanced

• The forces are balanced

• There are no forces acting on the rope

• The forces are acting in the same direction

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

• It will start moving faster

• It will change direction

• It will stay in place

• Both A and B are correct

When subtracting forces that are in opposite directions, you should...

• Add the forces together

• Subtract the smaller force from the larger force

• Multiply the forces

• Take the average of the two forces

Tags

CCSS.7.EE.B.3

If a car is moving to the right with a force of 10 N and friction is acting to the left with a force of 3 N, what is the net force?

• 7 N to the right

• 7 N to the left

• 13 N to the right

• 13 N to the left

Tags

CCSS.7.NS.A.3

What is the net force on an object when two equal forces act on it in opposite directions?

• 0 N

• The sum of the two forces

• The difference between the two forces

• Cannot be determined

If the net force on an object is zero, what can we say about the object's motion?

• The object is accelerating

• The object is moving at a constant speed

• The object is not moving

• Both B and C are correct

When adding forces that are acting in the same direction, you should...

• Subtract the forces

• Divide one force by the other

• Add the forces together

• None of the above

If a person is pushing a box to the left with a force of 15 N and another person is pushing it to the right with a force of 10 N, what is the net force and direction?

• 5 N to the left

• 5 N to the right

• 25 N to the left

• 25 N to the right

Which of the following is an example of unbalanced forces?

• A book resting on a table

• A car parked on a hill that is not moving

• A ball rolling down a hill

• A person standing still on the ground