Tina and her younger brother are playing in the garden. They see the gardener using a few tools. Tina recognises the wheelbarrow that the gardener is using. She also sees the gardener using a big garden scissor. Meanwhile, she sees that her younger brother is running to pick the axe that is lying around. Tina stops him and tells him it's dangerous.

Now, answer the following questions.

(a) Which simple machine is used in a scissor?

(b) Which simple machine is used in a wheelbarrow?

(c) Which simple machine is used in an axe?

(d) Why did Tina call the axe dangerous? Are there any other machines that shouldn't be used without adult's supervision?

(a) A scissor is a class I lever in which the fulcrum is between the effort and the load.

(b) A wheelbarrow is a class II lever in which the load is between the fulcrum and the effort.

(c) An axe is a wedge that helps split wood or cut objects.

(d) Tina called the axe dangerous because it has sharp edges and can cause serious injury if handled carelessly, especially by children.
Yes. Machines like knives, saws, drills, mixers, sewing machines, lawn mowers, and electrical appliances should not be used without adult supervision, as they can cause cuts, shocks, or accidents.