Answer:
1280°
Explanation:
The rotation of the pulley can be converted from 320 times per minute to per seconds as
320 times/360= 16/3 times per seconds
Now the rate at which the pulley is rotating in "per second"= 16/3 per seconds
To determine degrees a point on the edge of the pulley move in (2/3 seconds) then we can calculate as;
=( 16/3 per seconds × 2/3 )
=32/9 times/seconds
Which means, in 2/3 seconds, it moves with 32/9 times.
But 360° makes a rotation here, then
the degree a point on the edge of the pulley move in 2/3 seconds will be
(32/9 times× 360°)= 1280°
Hence, it moves at 1280°