Recent content by rivercats

If it's a typical bathroom scale, it'll be pre-calibrated to factor in the 9.8 to measure you accurately. Since it's reading in kg, which is a unit for mass, I would guess that the scale is a spring-based scale that actually measures weight, but factors in the 9.8 automatically to give a fairly...

I would say that D is correct. The amount of pain your foot feels is equivalent to the energy it absorbs, which is mgh. Since mg = weight, using either mg or simply weight means the equation remains the same. So, considering pain, mass and weight are pretty interchangeable. Consider this...

I should think so. Even though the force of your weight pushing down on the scale is what's being measured, the scale is calibrated to read the upward force that results from that. In other words, the scale attempts to balance the force of your weight by exerting an equal force (normal force)...

You would be correct in reasoning that C is right for the first two questions. While you might be tempted to say that a scale reads your weight, and it is true under normal circumstances that the force of your weight is equal to the upward force of the scale, the scale is calibrated to read the...

Though I can't be 100% sure, I'm going to assume that the graph you have mentioned is a v vs. t graph of uniform acceleration. There are a number of ways to determine the instantaneous acceleration between the points you listed, which would be (2, 1) and (5, 4). The first would be...