Here's a neat trick. If your average ceramic bowl has a mass of 200 g, what is the difference in Newtons between the weight of the bowls on the top of her head before and after she does the trick?
Details and assumptions
The acceleration of gravity is −9.8 m/s2.
To find the weight difference, we need to calculate the weight before and after the trick and subtract them.
First, let's find the weight of the bowl before the trick. Weight is calculated using the formula:
Weight = mass * acceleration due to gravity
Given:
Mass of the bowl = 200 g (or 0.2 kg)
Acceleration due to gravity = -9.8 m/s^2 (negative sign indicates the direction downwards)
Weight before = 0.2 kg * -9.8 m/s^2 = -1.96 N
Now, let's find the weight of the bowl after the trick. Since no change in mass is mentioned, the weight should remain the same.
Weight after = 0.2 kg * -9.8 m/s^2 = -1.96 N
To find the weight difference, subtract the weight after from the weight before:
Weight difference = Weight before - Weight after
Weight difference = -1.96 N - (-1.96 N)
Weight difference = -1.96 N + 1.96 N
Weight difference = 0 N
Therefore, the difference in Newtons between the weight of the bowls on the top of her head before and after she does the trick is 0 N.