Mass etc

1. The weight of the item differs by place. 
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3. For example, objects weigh less on the moon where gravity is lower compared to the earth.  See also "People ask" here. 
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5. Mass is the amount of matter present in a body while weight is a measure of how strongly gravity pulls on that matter. 
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7. Mass is the same wherever the item might be. 
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9. The moon has a surface gravity of around 1.62 meters per second squared,...  . In comparison, the Earth has a surface gravity of approximately approximately 9.8 meters per second squared. . Since the moon's surface gravity is one-sixth of Earth's, this is why astronauts' movements appear bouncier.  source.
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11. This means that, ignoring the effects of air resistance, the speed of an object falling freely will increase by about 9.8 metres (32 ft) per second every second. source
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13. Weight is a force. The weight of an object is its mass times the moving due to gravity.
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16. A force is an influence that can cause an object to increase its speed, i.e. accelerate, meaning a change in speed or direction.

Ask yourself: 'what makes the cars accelerate?'

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