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10 (a) A donkey has a weight of 2500 N - Edexcel - GCSE Physics - Question 10 - 2022 - Paper 1
Question 10
10 (a) A donkey has a weight of 2500 N. The area of each hoof is 0.022 m². (i) Calculate the average pressure that the donkey exerts on the ground. Use the equation... show full transcript
Worked Solution & Example Answer:10 (a) A donkey has a weight of 2500 N - Edexcel - GCSE Physics - Question 10 - 2022 - Paper 1
Step 1
Calculate the average pressure that the donkey exerts on the ground.
Answer
To calculate the average pressure, we can use the formula:
ext{pressure} = rac{ ext{force}}{ ext{area}}Given:
- Force (weight of the donkey) = 2500 N
- Area = 0.022 m²
Substituting these values into the equation, we get:
ext{pressure} = rac{2500 ext{ N}}{0.022 ext{ m}²} = 113636.36 ext{ Pa} \ ext{(or approximately } 28,000 ext{ Pa)}Step 2
Explain how a camel's hoof is a more suitable shape than a donkey's hoof for walking on soft ground.
Answer
A camel's hoof is broader and has a larger surface area compared to a donkey's hoof. This design allows the camel to spread its weight more evenly over a larger area, reducing the pressure exerted on the soft ground. Consequently, it minimizes sinking into the sand, enabling better mobility and stability in desert environments.
Step 3
Step 4
Draw a line of best fit through the points on the graph.
Answer
To draw the line of best fit, you should take into account the overall trend of the plotted points. The line should be straight and pass as close as possible to the majority of the points, representing the general relationship between depth and pressure.
Step 5
Use the graph in Figure 27 to predict the pressure at the surface of the water.
Answer
From the graph, we observe the trend and can estimate the pressure at the surface of the water. Based on the plotted points and the established linear relationship, the pressure at surface level would typically be around 100 kPa.
Step 6
Compare the graph for seawater with the graph in Figure 27.
Answer
The graph for seawater would show a higher pressure value at the same depths when compared to the freshwater graph in Figure 27. This is due to the greater density of seawater, which leads to increased pressure at equivalent depths, demonstrating the relationship between fluid density and pressure.