Multi-Block Problems

Identify liquid lubricant from the following,

Coulomb friction is the friction between.

A $1\mathrm{kg}$ block is resting on a surface with coefficient of friction$0.1$. A force of $0.8\mathrm{N}$ is applied to the block.The block moves with a velocity $2 {\mathrm{ms}}^{-1}$.

When to bodies are in relative motion, then friction force acts in the direction of motion of body.

Draw free body diagram of $3\mathrm{kg}$ block.

Cotyledons are also called-