While playing tug of war (Fig.12.4), Preeti felt that the rope was slipping through her hands. Suggest a way out for her to prevent this.

While playing tug of war, Preeti felt that the rope was slipping through her hands. To prevent this, first she need to make her smooth hand non-smooth.

⇒ Because the friction decreases as the surface becomes smooth. Hence, the rope was slipping through her hands (smooth).

⇒ To make her hands non-smooth, she should apply sand on both the hands.

⇒ Due to the sand, her hands become non-smooth (rough)

⇒ Friction increases when the surface is rough.

⇒ As a result, friction increases between the rope and her hand and now the rope won’t slip through her hands.