This is a must for your lab. An economical introduction to the concepts of inertial and gravitational mass; with it you can calculate the periodic motion produced by the two blades of the balance when it is pushed sideways and use it to show that gravity plays no role in its operation. This PSSC listed item contains two aluminum trays, one with a hole; two spring blades; one iron slug with a hole for threading; one base plate; nylon cord; and a detailed instruction manual. Size: 35.5 x 10cm.
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