Forces and Motion Concepts

What happens when two objects push or pull on each other?

• One object pushes, the other does nothing.

• They push or pull with different strengths and directions.

• They push or pull with the same strength but in opposite directions.

• They only push, never pull.

When a ball sits on a table, what are the two main forces acting between them?

• Gravity pulling the ball down and friction holding it still.

• The ball pushing down on the table and the table pushing up on the ball.

• The table pulling the ball and the ball pushing the table.

• Air pushing the ball and the table pushing the air.

How does a bird fly upwards?

• It pulls itself up with its beak.

• It pushes air downwards, and the air pushes it upwards.

• It uses its legs to jump very high.

• It makes itself lighter than air.

When a person steps off a small boat onto the land, the boat moves backward a lot. If the same person steps off a very large ship, the ship barely moves. Why does this happen?

• The person pushes the boat harder than the ship.

• The ship is too heavy to move much, even with the same force.

• The water around the ship holds it in place.

• The person doesn't apply any force to the ship.