Which has the highest inertia among solids made of aluminium,steel,and wood of the same shape and same volume?

State whether the following statement is true or false:
The force of friction is smaller in solids than in liquids.

$A$ sledge of mass $80 \, kg$ moves over the frozen surface of a lake with a velocity of $30 \, m s^{-1}$ and comes to rest in $5 \, s$. Find its negative acceleration and the frictional force between the lake and the sledge.

State Newton's third law of motion. Give two examples.

$A$ body of mass $500 \, g$ is at rest on a frictionless surface. Calculate the distance travelled by it in $10 \, s$ when acted upon by a force of $10^{-2} \, N$. (in $, m$)

Define $(i)$ force $(ii)$ dyne $(iii)$ newton.