We know that the two pulley are of same sizes with diameter 5 inch.
Also they are connected by a straight belt that is untwisted.
Now when one pulley is turned with 15 rpms an a clockwise direction, the other pulley will also move with same speed that is with 15 rpms and in the same clockwise direction, because both the pulleys are of same diameter.and same sizes pulley will rotate or move with the same speeds. And as they are not directly connected, they are separated by a distance and is connected by a straight belt, so they will move in the same direction.
A. An obtuse angle is less than 180 but greater than 90. So for examples sake I will use 179 degrees. 179 divided by 2 (as the angles are congruent) = 89.5 which is less than a right angle. Therefore, the angles will be acute.
