Forces and Moments

What is the definition of balanced forces?

• Forces that are equal in magnitude and opposite in direction

• Forces that are equal in magnitude and different in direction

• Forces that are unequal in magnitude and opposite in direction

• Forces that are equal in magnitude and same in direction

What is the definition of unbalanced forces?

• Forces that are equal in magnitude and opposite in direction

• Forces that are equal in magnitude and same in direction

• Forces that are not equal in magnitude and same in direction

• Forces that are not equal in magnitude and opposite in direction

Give an example of balanced forces.

• Two people pushing a box with equal force in opposite directions.

• A person pushing a box with a smaller force than another person in the same direction.

• A person pushing a box with a greater force than another person in the opposite direction.

• A person pushing a box with a greater force than another person in the same direction.

Give an example of unbalanced forces.

• Pushing a car downhill

• Pulling a car downhill

• Pushing a car uphill

• Pushing a car on a flat road

How do you calculate moments of force?

• Multiply the force applied by the perpendicular distance from the point of rotation.

• Subtract the force applied from the perpendicular distance from the point of rotation.

• Add the force applied to the perpendicular distance from the point of rotation.

• Divide the force applied by the perpendicular distance from the point of rotation.

What is the formula for calculating moments of force?

• force divided by the perpendicular distance from the pivot point

• force multiplied by the parallel distance from the pivot point

• force multiplied by the total distance from the pivot point

• force multiplied by the perpendicular distance from the pivot point

A seesaw is balanced with two children sitting on opposite ends. Is this an example of balanced or unbalanced forces?

• balanced

• unbalanced

• equal

• unequal

A car accelerating on a straight road. Is this an example of balanced or unbalanced forces?

• static

• unbalanced

• equal

• balanced

A wrench turning a bolt. Is this an example of balanced or unbalanced forces?

• unbalanced

• harmonious

• equal

• balanced

A person pushing a heavy box across the floor. Is this an example of balanced or unbalanced forces?

• unbalanced

• balanced

• equal

• harmonious