Rockets carry satellites into space - OCR Gateway - GCSE Physics - Question 20 - 2021 - Paper 2
Question 20
Rockets carry satellites into space.
(a) Satellites are kept in orbit around a planet by a force.
Name this force?
(b) Name the Earth's natural satellite.
(c) A v... show full transcript
Worked Solution & Example Answer:Rockets carry satellites into space - OCR Gateway - GCSE Physics - Question 20 - 2021 - Paper 2
Step 1
Force keeping satellites in orbit
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Answer
The force that keeps satellites in orbit around a planet is known as gravity.
Step 2
Name the Earth's natural satellite
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Answer
The Earth's natural satellite is the Moon.
Step 3
Calculate the weight of the Mars Rover vehicle on Mars
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Answer
To calculate the weight of the Mars Rover on Mars, use the formula:
Rounding to 3 significant figures, the weight of the Mars Rover on Mars is 694 N.
Unit: N
Step 4
Why did the Mars Rover weigh more on Earth than on Mars?
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Answer
The Mars Rover weighs more on Earth than on Mars because the gravitational field strength on Earth is greater than that on Mars. On Earth, the gravitational field strength is approximately 9.81 N/kg, which results in a higher weight for the same mass compared to Mars where it is only 3.75 N/kg.
