Problems you often assume that friction is negligible on smooth surfaces and can

Question

Problems you often assume that friction is negligible on smooth surfaces and can be ignored. In addition, the word friction commonly refers to other than air drag that are caused by contact between surfaces, so you can ignore air drag in problems unless you are explicitly told to consider its following examples should help you lean to draw free-body diagrams. We will start with relatively simple situations in which the object of interest is or fairly obvious. A hockey puck slides along a horizontal, smooth icy surface at a constant velocity as shown. (Figure 1) Which of the following forces act on the puck?

Explanation / Answer

forces on Puck

1. weight

2. friction

3.normal force

4.force of push

5. air drag

acceleration and velocity is caused by all these force hence these are not forces.

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