Answer:
7.54 m/s
Explanation:
C = 2πr
C = 2π (0.450 m)
C = 2.827 m
v = d / t
v = 25.0 (2.827 m) / (9.37 s)
v = 7.54 m/s
Suppose earth is a soid sphere which will attract the body towards its centre.So, acc. to law of gravitation force on the body will be,
F=G*m1m2/R^2
but we now that F=ma
and here accleration(a)=accleration due to gravity(g),so
force applied by earth on will also be mg
replace above F in formula by mg and solve,
F=G*mE*m/R^2 ( here mE is mass of earth and m is mass of body)
mg=G*mEm/R^2
so,
g =G*mE/R^2
Energy stored in a capacitor is Electric Potential Energy. Capacitor is device used for storing energy. The work done to charge is a capacitor is stored in it in the form of Electrical potential energy. Electrical potential energy is defined as capacity to do work due to the position change. For example, we know fans have capacitor installed in it. When we turn off the fan, it continue moving using the electrical energy stored in the capacitor.
The resultant force will be
twice the applied force.In a lever, the total distance from the applied force to the fulcrum is
the effort arm. And, the distance between load and the fulcrum is
the load arm.
When the effort arm is two times the load arm, it means the resultant force will be twice the applied force.
Because, Force = displacement × speed