Forces and Changes in Motion 13.1

Bar magnets have a north pole (N) and a south pole (S). Latisha places a bar magnet on three small straws so that it can roll. Placing which of the following objects at point X will cause the bar magnet to move away from point X?
Options: an iron nail, an aluminum can, the north end of another bar magnet, the south end of another bar magnet

What conclusion can Lena make from her data? Time (sec) | Total movement of ball (cm) 0 | 0 10 | 10 20 | 20 30 | 28 40 | 31

What force caused the ball to start to move downward?

What must the crane work against in order to lift the container upward?

Many types of forces can affect an object. Which of these is an example of a force being applied?

The spring scale shown has a weight attached to it. In this arrangement, what is the spring scale being used to measure?

When you coast down a hill on a bicycle, you move faster and faster. Then when you keep coasting on a level surface, you eventually stop moving. What causes you to stop?

When an unbalanced force acts on an object, the motion of the object changes. Sometimes the object continues to move at the same speed. When that happens, what is it that changes?

For which surface will friction be greatest when a block of wood slides across it?

Martin is taking his nephew for a walk. The picture below shows how Martin moved his nephew’s stroller. Which term describes the force that caused the stroller to move?