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Kinetic Energy Exploration

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Kinetic Energy Exploration

Explore how motion relates to kinetic energy. Read the scenario and use evidence from the activities to explain your thinking.

Motion at the marae visit

Hemi and Tane are helping set up for a marae visit. They safely roll a ball down a gentle ramp, carry a kete, and watch a small wheeled trolley being pushed. Compare the objects' movement and their kinetic energy. An object at rest has no kinetic energy of motion. For objects of the same kind, a faster-moving object has more kinetic energy than a slower one. A heavier moving object can also have more kinetic energy than a lighter one moving at the same speed. Kinetic energy can be transferred or changed into other forms, such as sound or heat, when moving objects slow down or collide.

1.Which statement best describes kinetic energy?

Energy an object has because it is moving
Energy stored only in food
Energy that exists only in sunlight
Energy an object has when it is completely still

2.Tick every example that has kinetic energy at that moment: a trolley rolling, a kete resting on the ground, a person walking, a ball held still, or a bird flying.

3.Complete the idea: “When an object is , it has energy of motion, called energy.”

4.Two identical balls roll along the ground. Ball A moves slowly and Ball B moves faster. Which ball has more kinetic energy? Explain using the scenario's science idea.

5.Order these moments from least to most kinetic energy for the same ball: rolling quickly, held still, rolling slowly. Write 1, 2 and 3.

6.A heavy trolley and a light trolley move at the same speed. According to the passage, which is likely to have more kinetic energy, and why?

7.True or false: A ball still sitting on the ground has kinetic energy because it could roll later.

TrueFalse

8.When the rolling ball slows and stops, what happens to its kinetic energy? Give one possible form the energy may change into.

9.Plan a fair test comparing how fast a ball rolls down a ramp. Name one thing to change and two things to keep the same.

10.At the visit, why should people stand clear of a moving trolley? Connect your answer to kinetic energy and a possible consequence.

Draw one moving object from the scenario and add arrows or motion lines to show it moving. Label it with one sentence explaining why it has kinetic energy.