Balancing Forces

1. What is a force? (maybe more than one answer choice)

• a pull on an object

• a push on an object

• a combination of all forces

• none of the answer choices

2. A combination of all the forces acting on an object is called___________________.

• unbalanced force

• balanced force

• net force

• gross force

To find the net force on an object:

• Always subtract the amounts of the forces

• Multiply the forces together

• Combine the amounts of the forces acting on the object

• Divide the larger force by the smaller one

When the net force on an object is zero, we say that the two forces are:

• Cancelled out

• Gross

• Balanced

• Unbalanced

When the net force on an object is zero, the object's motion will:

• Change

• Stop

• Not change

• no answer choice available

When forces are balanced, they____________. (maybe more than one answer choice)

• Have no effect on the object

• Don't cause any change in the motion of an object

• Might crush the object

• Causes the object to move faster

If you are pushing a box toward your friend with a force of 20 N, and your friend is pushing the box toward you with a force of 30 N, what will happen to the box?

• The box will move toward your friend with a force of 50 N.

• The box will move toward you with a force of 10 N.

• The box will move toward your friend with a force of 10 N.

• The box will move toward you with a force of 50 N.

If you are pulling on a box with a force of 30 N, and your friend is pushing the box in the same direction with a force of 30 N, what will happen to the box?

• The box will move in the direction of your pull with a force of 30 N.

• The box will not move because the forces are balanced.

• The box will move in the direction of your friend's push with a force of 30 N.

• The box will move in the direction of the push and pull with a force of 60 N.

The picture above shows two teams playing a game of tug-of-war. What will happen if Team B pulls with a greater force than Team A?

• The rope will move toward Team A.

• The rope will move toward Team B.

• The forces on the rope will be balanced.

• There will be a zero net force on the rope.

Which of the following statements describes unbalanced forces?

• Unbalanced forces can cause a still object to move, a moving object to speed up or slow down, a moving object to stop, or a moving object to change direction.

• Unbalanced forces can only change the direction an object is moving.

• Unbalanced forces can only change the speed an object is moving.

• Unbalanced forces cannot change the motion of an object.