A 3 kg block measures 5 cm by 10 cm by 20 cm. When it slides on a 10 cm by 20 cm face, it moves with constant speed when pulled horizontally by a force whose magnitude is 3 N. How big a horizontal...

A 3 kg block measures 5 cm by 10 cm by 20 cm. When it slides on a 10 cm by 20 cm face, it moves with constant speed

when pulled horizontally by a force whose magnitude is 3 N. How big a horizontal force must be applied to pull it with

constant speed if it slides on a 5 cm by 20 cm face?