A box is placed on a rough surface. It has a normal force of magnitude 120N .A force of 20N applied to the right cannot move the box. Calculate the magnitude and direction of the friction forces​

Alightning strike consists of charge moving from a cloud to the ground . in one particular case, the electrons in a lightning strike are confined to travel within a radius of 1.5 m and to move at a speed of 5.0 x 10 m/s. if the density of electrons in the strike is 10'15 electrons/m what current is carried by the lightning ?

A12-kg bag of groceries is tossed onto a table at 4.0 m/s and slides to a stop in 2.2 s . modify the equation fδt=δ (mv) to find the force of friction.

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?