Answers to AQA GCSE Introduction to Moments
Practice questions
1.A force of 20N is applied to a lever using a distance from the pivot of 60cm. Calculate the moment produced
Convert 60cm into 0.6m
Moment = Force x distance
Moment = 20N x 0.6m = 12Nm
2. Use the diagram below to help you to answer the question
A force of 100N applied where the force arrow is shown. Calculate the size of the anticlockwise moment
Total distance from pivot (triangle) to the line of action of force is 3m. 4m-1m = 3m.
Moment = force x distance
Moment = 100N x 3m = 300Nm.
3. Use the image of the screwdriver opening the paint tin to help you to answer the following question:
Explain in terms of moments how a screwdriver can make it easier to open a tin of paint.
The edge of the tin will act as a pivot. The screwdriver handle will increase the distance between the pivot and where the force is applied. Therefore, only a small force needs to be applied to generate a large moment, causing the tin to open.
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Niels Bohr changing the Nuclear Model
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Random nature of radioactive decay
Radioactive contamination or irradiation
Hazards of contamination and irradiation
Studies on the effects of radiation on humans
Different half lives of radioactive isotopes
Nuclear Fission Chain Reaction
Writing nuclear fission equations