8.15m. La altura de la casa de la cual se deja caer un objeto que tarda en caer 
es de 8.15m.
La clave para resolver este problema es mediante caída libre, la velocidad inicial del objeto es 0 por lo que podemos calcular la altura h de la casa mediante la relación 
.
Conocemos la gravedad 
y el tiempo en que tarda en caer el objeto 
, sustituyendo los valores tenemos que:
Newton 3rd law:
F=ma
1600=85*a
1600/85=a
a=18.82 m/s^2
Answer:
13520 N
Explanation:
Pascal's Principle: The principle states that the pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and the walls of the containing vessel.
The operation of hydraulic press and car brake system is based on pascal's principle.
From pascal's principle,
F/A = f/a ........................... Equation 1
Where F = force exerted by the large piston, A = area of the large piston, f = force applied to the small piston, area of the small piston.
Making F the subject of the equation
F = A(f/a)......................... Equation 2
Given: A = 0.13 m², a = 0.0075 m², f = 780 N
Substituting into equation 2
F = 0.13(780/0.0075)
F = 13520 N.
Thus the force exerted by the large piston = 13520 N
Answer:
B = 1.823 T.
Explanation:
Given,
Number of turns,N = 170 turn
Side of square loop,L = 22 cm
Maximum torque, τ = 295 N.m
Current on the loop, I = 20 A
Magnetic strength = ?
Torque = N BIA
300 = 170 x B x 20 x 0.22²
300 = 164.56 B
B = 1.823 T.
Hence, the magnetic field strength is equal to B = 1.823 T.
