A discus thrower (arm length 0.9 m) starts from rest and begins to rotate counte

Question

A discus thrower (arm length 0.9 m) starts from rest and begins to rotate counterclockwise with a constant angular acceleration of +2.1 rad/s2.

(a) How many radians of angle does it take for the discus thrower's angular velocity to reach +5.5 rad/s?
____rads
(b) How long does this take?
_____seconds

At this time (from part b), please find the following quantities:

(c) the linear speed of the discus:
_______m/s

(d) the size of the discus's tangential acceleration:
_______m/s2
the size of the discus's centripetal acceleration:
_________m/s2

the size of the discus's total acceleration:
_________m/s2
the angle that the total acceleration makes with the velocity vector is:
__________degrees

Explanation / Answer

1. 7.207rad

2.   2.62s

3. 4.95m/s

4. 1.89m/s^2

5. 27.225m/s^2

6. 27.291m/s^2

7. 86.03degree

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