A tight-rope walker carries a long pole which he holds across his body. The purpose of this pole
is to------?
A. Prop him up if he falls
B. Spread out his weight and reduce the pressure on the rope
C. Add extra weight to keep the rope tightly stretched
D. To keep the centre of gravity always vertically above the rope (Answer)
is to------?
A. Prop him up if he falls
B. Spread out his weight and reduce the pressure on the rope
C. Add extra weight to keep the rope tightly stretched
D. To keep the centre of gravity always vertically above the rope (Answer)