Arubber block weighing 60. newtons is resting on a horizontal surface of dry asphalt. what is magnitude of the minimum force needed to start the rubber block moving across the dry asphalt?

The magnitude of the minimum force needed to start the rubber block moving across the dry asphalt is 51 N.

Given data:

The weight of block is, .

The block will start moving when it overcomes the frictional force between the asphalt surface and the block. Therefore,

here, is the coefficient of friction of Asphalt, and its value is 0.85.

N is the normal reaction force which is equal to weight of block.

Solving as,

Thus, the magnitude of the minimum force needed to start the rubber block moving across the dry asphalt is 51 N.

Learn more about the frictional force here:

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what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s