The 4.00 kg block is attached to a vertical rod by means of two strings. When the system rotates about the axis of the rod, the strings are extended as shown in the (Figure 1) and the tension in the upper string is 90.0 N What is the tension in the lower cord? How many revolutions per minute does the system make? Find the number of revolutions per minute at which the lower cord just goes slack.
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.
The 4.00 kg block is attached to a vertical rod by means of two strings. When the system rotates about the axis of the rod, the strings are extended as shown in the (Figure 1) and the tension in the upper string is 90.0 N
What is the tension in the lower cord?
How many revolutions per minute does the system make?
Find the number of revolutions per minute at which the lower cord just goes slack.
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It asked for the tension in the LOWER string! Not the upper!!
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