Motion 2 LASE

During recess, you and your friends are playing on the seesaw. You start to notice that it's easier or harder to lift the other side, depending on where you sit. How does the position of the students on the seesaw affect its motion?

• Sitting closer to the center makes it easier to lift the other side.

• Sitting farther from the center makes it easier to lift the other side.

• The position doesn't affect how easy it is to lift the other side.

• Only the weight of the students, not their position, affects the motion.

During recess, a group of students is curious about how swings work. They want to investigate how different ways of starting a swing's motion affect how far it moves. Which method would give them the most complete information?

• Push the swing with different strengths, measure how far it goes each time, and compare the results.

• Pull the swing back at different distances, let go, and measure how far it travels each time.

• Pull the swing back to one set distance, push with different strengths, and measure how far it travels each time.

• Push and pull the swing with different strengths and distances, measuring how far it travels in each case.

A wrecking ball is used to demolish old buildings. It hangs from a single strong rope or cable on a crane. How might the crane operator control the wrecking ball's movement to hit a specific part of a building safely?

• By adjusting the length of the rope

• By swinging the ball with precise timing

• By changing the weight of the ball

• By using a remote control to guide the ball

Two students want to investigate how different pushes and pulls affect the motion of a toy car on a smooth floor. They plan to try four different methods:

• Student A pushes the car while Student B pulls it in the opposite direction.

• Student A pulls the car while Student B pushes it in the same direction.

• Student A pushes the car while Student B pushes it in the same direction.

• Student A pulls the car while Student B pulls it in the opposite direction.

Which method will likely make moving the car in one direction easiest for the students?

• Push the car

• Pull the car

• Both push and pull

• Neither push nor pull