Which of the following agricultural tool is used to sow the seeds in the field?

Choose the correct statement in the case of multipurpose tools.

Which of the following is a modern scientific machine which can perform multiple tasks in agriculture?

The motion of the handle of the plough while ploughing is _____.

Match the entries in column A with that of in column B.

A screw of length $8 \mathrm{cm}$ has the pitch of $1 \mathrm{mm}$. In one second, a hammer applied $10 \mathrm{dyne}$ force to displace the screw into the wooden block through a distance equal to its pitch. Find the total force required to fix the screw up to its $75 \mathrm{th}$thread in it.

Why do we use a sharp continuous metal blade for cutting a mango and a blade with many small teeth for cutting metals?

Sriharsha doubted as to why the head of a screw drivers is made of plastic material and not metal. Clarify his doubt.

The square-shaped metallic strip of a leveller covers an area of $400 {\mathrm{cm}}^2$ in $1 \mathrm{s}$. Then, how much time it will take to level a field of area one hectare and find its speed?