Force (Unit 1, Part 1)

If you lean against a small tree and the tree slightly bends, what force prevents you from falling over backwards?

• Gravity will prevent you from falling.

• Magnetic force attracts you to the tree.

• Your push against the tree is balanced by the tree pushing back.

• Your push against the tree is balanced by the tree pulling on you.

Which of the following does every force have?

• a push

• a pull

• strength and direction

• direction and speed

If you are playing tug-of-war, but neither side is moving, what are you demonstrating?

• push and pull

• unbalanced forces

• gravity and friction

• balanced forces

The foundation of a house is made of cement blocks which support the weight of the house. Which sentences describe the forces on the house? (Choose 2)

• The force of gravity is pulling the house downward.

• The blocks do not exert a force on the house.

• The blocks exert a downward force on the house.

• The blocks exert an upward force on the house.

When you lift your backpack, what kind of force are you using?

• A contact force because you have to touch it to lift it.

• A predictable force because you know where you're going.

• A regular force because we do it everyday.

• Gravity will pick up the bookbag on its own.