Chapter 1: Q5DQ (page 389)
You have probably noticed that the lower the tire pressure, the larger the contact area between the tire and the road. Why?
The pressure is inversely related to the contact area.
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An antelope moving with constant acceleration covers the distance between two points apart in. Its speed as it passes the second point is. What are (a) its speed at the first point and (b) its acceleration?
Comparing Example 12.1 (Section 12.1) and Example 12.2 (Section 12.2), it seems that 700 N of air is exerting a downward force of on the floor. How is this possible?
How many times does a typical person blink her eyes in a lifetime?
A particle of mass 3m is located from a particle of mass m.
(a) Where should you put a third mass M so that the net gravitational force on M due to the two masses is precisely zero?
(b) Is the equilibrium of M at this point stable or unstable (i) for points along the line connecting m and 3m, and (ii) for points along the line passing through M and perpendicular to the line connecting m and 3m?
In each case, find the x- and y-components of vector: (a); (b); (c); (d), where.
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