On the horizontal surface of a truck a block of mass 1kg is placed and truck is moving with acceleration 5m/sec then the frictional force on the block will be?

is the puck sliding?

To find the frictional force on the block, we need to consider the forces acting on it. In this case, there are two forces: the force due to the acceleration of the truck and the force of friction.

The force due to the acceleration of the truck, also known as the "pseudo force," can be calculated by multiplying the mass of the block (1 kg) by the acceleration of the truck (5 m/s²). Thus, the force due to acceleration is 1 kg × 5 m/s² = 5 N.

Now, let's analyze the forces acting on the block. We know that the force due to acceleration is acting in the same direction as the motion of the truck, since both are directed horizontally. The frictional force, however, opposes the motion of the block relative to the truck's surface.

When the truck is moving with an acceleration, the frictional force can be found using the equation: frictional force = mass of the block × acceleration of the truck.

Using the given values, the frictional force is equal to 1 kg × 5 m/s² = 5 N.

Therefore, the frictional force on the block will be 5 N.