Skill Development Education Centre
Physics Test
YEAR 7
Total – 30 marks
Time allowed – 30 minutes
Name ………………………………………
Room ………………
Score –
marks
1. a. Write mass or weight next to each statement in the second column.
(6 marks)
Statement
Mass or Weight
The force of gravity acting on an object
Can be represented by a force arrow
Measured in kilograms
Measured in newtons
Add 50 g of salt to 1 kg of water
5 apples are about 5 N
b.
How would your weight on the Moon compare to the Earth? Explain your answer.
(2 marks)
c.
How would your mass be on the Moon compare to the Earth? Explain your answer.
(2 marks)
(Total for Question 1 is 10 marks)
2. On Earth, the gravitational field strength is 10 N/kg.
Weight can be calculated by:
weight = mass x 10
Calculate the weight of the following objects on the Earth:
a. A suitcase of mass 22 kg. Show your working.
(2 marks)
Weight = …………………………
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b. A pencil case of mass 0.3 kg. Show your working.
(2 marks)
Weight = …………………………
c. A car of mass of mass 1110 kg. Show your working.
(2 marks)
Weight = …………………………
d. A bag of mass 1.2 kg, containing 5 books, each of 0.5 kg. Show your working.
(3 marks)
Weight = …………………………
(Total for Question 2 is 9 marks)
3. Calculate the mass of the following objects:
a. A girl with a weight of 490 N on the Earth. Show your working.
(2 marks)
Mass = ………………………
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b. A bag of sugar with a weight of 9 N on the Earth. Show your working.
(2 marks)
Mass = ………………………
(Total for Question 3 is 4 marks)
4. Weight can be calculated as:
weight = mass x gravitational field strength
An astronaut has a mass of 80 kg. Gravitational field strength on the Moon is 1.5 N/kg.
a. Calculate the astronaut’s weight on the Moon. Show your working.
(2 marks)
Weight = ……………………
b. The astronaut travels to Mars where her weight becomes 320 N.
Work out the gravitational field strength on the surface of the Mars.
(3 marks)
Gravitational field strength = …………………… N/kg
c. Jupitar is much larger than Mars.
Suggest what will happens to her weight if she travelled to the surface of Jupiter.
Explain your answer.
(2 marks)
(Total for Question 4 is 7 marks)
TOTAL FOR ALL QUESTIONS IS 30 MARKS
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