A 460 kg crate is being pulled at constant velocity by a force directed at 30° to the horizontal as shown in the diagram. The coefficient of dynamic friction between the crate and the floor is 0.24. Calculate a the magnitude of the pulling force and b the reaction force from the floor on the crate

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 ?

An electric current is flowing through the cord below.what will happen to this current if a magnet is brought near the cord? a. the electric current will stop flowing. b. it will exert a force on the voltage. c. the resistance of the wire will decrease. d. it will exert a force on the electric current.

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?