1

IIT-JEE 1993

Fill in the Blanks
A uniform rod of length L and density $$\rho $$ is being pulled along a smooth floor with a horizontal acceleration $$\alpha $$ (see Fig.). The magnitude of the stress at the transverse cross-secion through the mid-point of the rod is _________.

Answer

$${{\rho L\alpha } \over 2}$$
2

IIT-JEE 1984

Fill in the Blanks
A block of mass 1 kg lies on a horizontal surface in a truck. The coefficient of static friction between the block and the surface is 0.6. If the acceleration of the truck is 5 m/s2, the frictional force acting on the block is _________ newtons.

Answer

5

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