A large block is held at rest on a frictionless surface and attached by a string to a small block that hangs in the air, as shown in the picture. The large block is released and slides on the surface a
distance of 2.24 meters in 1.74 seconds. The mass of the small block is 50.0 grams. Find the mass
of the large block.

The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

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