Tarzan and jane, wholse toatl mass is 130 kg starts their swing on a 5m long vine is at an angle of 30 degree with the horizontal. at the bottom of the arc, jan, whose mass is 50kg releases the vine. what is the maximum height at which tarzan can land on a branch after his swing continues? (hint: treat tarzan's and jane's energyies as separate quantities)

h' = 2.5 m

Explanation:

combine mass of Tarzan and Jane, M= 130 Kg

height of vine = 5  m

angle made with horizontal = 30°

mass of Jane , m= 50 Kg

angle made with vertical = 60°

cos 60° = x/5

x = 5 x 0.5

x = 2.5 m

h = 5 - 2.5 = 2.5 m

using conservation of energy

mechanical energy is converted into kinetic energy

    v = 7 m/s

total energy when Jane leaves

Total energy =

Total energy =

Total energy =1960 J

now,

maximum height attain by the Tarzan

m' g  h' = total energy

80 x 9.8 x h' = 1960

h' = 2.5 m

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia