16. Jeff Gordon leads his race and must drive into a curve at top speed to win it all. The radius of the curve is 1000 m and the coefficient of static friction between his tires and the dry pavement is 0.50 Page Figure 10 www.clastockphoto.com R
Angular speed, acceleration and displacement
Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.
Angular Position
Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.
19.A small car with mass 0.800 kg travels at constant speed on the inside of a track that is a
vertical circle with radius 5.00 m (Fig. 12). If the normal force exerted by the track on the
car when it is at the top of the track (point B) is 6.00 N,
Calculate the normal force on the car when it is at the bottom of the track (point A). (2)
A) 45.7 N
B) 30.9 N
C) 87.9 N
D) 12.8 N
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