3. (a) In the box are the names of some forces that can provide a centripetal force - Edexcel - GCSE Physics - Question 3 - 2016 - Paper 1
Question 3
3. (a) In the box are the names of some forces that can provide a centripetal force.
friction gravity magnetism reaction tension
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Worked Solution & Example Answer:3. (a) In the box are the names of some forces that can provide a centripetal force - Edexcel - GCSE Physics - Question 3 - 2016 - Paper 1
Step 1
(i) When a satellite orbits the Earth the centripetal force is provided by
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gravity.
Step 2
(ii) When a motorbike goes around a flat circular track the centripetal force is provided by
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Answer
friction.
Step 3
(c)(i) Complete the graph by plotting the other two points.
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Plot the points (3.00, 6.0) and (4.00, 6.9) on the existing graph, ensuring they are accurately represented.
Step 4
(c)(ii) Draw a curve of best fit.
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The curve should smoothly connect the plotted points, starting from the origin and passing through at least four points without forming any double lines.
Step 5
(c)(iii) Use your graph to estimate the speed of the ball when the force is 6 N.
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The estimated speed of the ball when the force is 6 N is approximately 7.2 m/s to 7.5 m/s, based on the graph.
Step 6
(c)(iv) Use the graph to describe how the speed varies with the force on the ball.
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As the force increases, the speed of the ball also increases. The relationship is not strictly proportional; the speed increases at a faster rate for smaller forces and slower for larger forces, indicating diminishing returns as force increases.
