A ball rolls to the right at 5m/s along a 1.5m high table. It rolls off the edge and falls. (Air

resistance is negligible). What is the initial vertical velocity as it falls off the table?

A

ball rolls to the right at 5m/s along a 1.5m high table. It rolls off the edge

and falls. (Air resistance is negligible). How long does it take the ball to

fall to the ground? Give your answer to two decimal place in units of s. Do not include units in your answer i.e. you would write 10 s as 10.

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For an experiment in this unit, you need to calculate the mass of a cube. You measure the length of one edge of the cube to be 7.4 ± 0.1 cm. The density of the cube is 8.0 ± 0.2 g cm^-3. What is the absolute uncertainty in the mass of the cube (to 1 sig fig) calculated from these values?

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In an experiment for this unit, theory predicts that the time take for a mass to roll down a slope will be 2.75 ± 0.05 s. Your repeated measurements of the speed gives a value of 2.40 ± 0.05 s. Are your measurements consistent with the theory?

In an experiment for this unit you measure the mass of a filled beaker to be 1.5 ± 0.1 kg. You can assume the likelihood the “true value” of the mass lies between 1.3 kg and 1.7 kg is:

For an experiment in this unit, you measure the length of a spring, with a mass hanging from it, using a metre ruler with mm markings. As your estimate of the standard uncertainty:

You take 49 repeated measurements of how long it takes a bicycle wheel, that starts from rest, to make one full rotation, when driven by a falling weight attached to the wheel. The standard uncertainty in this measurement is (where s is the sample standard deviation of the repeated measurements):

In taking multiple measurements of the same quantity, you take a measurement that is significantly different from all your other measurements, you believe it to be an “outlier”. What do you do with the value of this measurement?