## AQA GCSE Calculating Weight

**Calculating Weight**

On Earth, the value for g = 9.8 N/kg. On different planets, the vary of g can vary.

**Sample Questions**

1.A man has a mass of 60kg on Earth. Assuming g = 9.8N/kg, calculate his weight

W = m x g

W = 60 x 9.8

W = 588N

2. The label on a weight has worn off and it cannot be seen. However, when Ben placed the weight on a balance it had a mass of 60g. Calculate its weight, assuming that g = 9.8N/kg

Convert 60g to kg

60/1000 = 0.06kg

W = m x g

W = 0.06 x 9.8

W = 0.588N

3. Planet Zeeburger has an unknown value for gravitational field strength. However, Barry has a mass of 75kg and a weight of 450N on Zeeburger. Calculate the value for gravitational field strength

g = W/m

g = 450/75

g = 6N/kg

4. On Earth a person has a weight of 1176N. Calulate their mass. Assume g = 9.8N/kg.

m = W/g

m = 1176/9.8

m = 120kg

**Practice Questions**

1.Calculate the weight of a tennis ball that has a mass of 45g. Assume g = 9.8N/kg

2. On Planet ABCD a man has a weight of 2000N and a mass of 100kg. Calculate the value for gravitational field strength for planet ABCD.

3. Calculate the mass of an object that has a weight of 5000N on Earth, when g = 9.8N/kg

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