Answer:
The free body diagram of John is shown in the attached figure (in the FBD john's mass is supposed to be concentrated at his center of mass and FBD is made of center of mass)
b) As shown in the FBD the ground reaction forces are:
i) In X direction 
ii) In Y direction 
c) The respective accelerations in x and y direction's is calculated by newton's second law as indicated under
Answer:
amplitude
Explanation:
amplitude of a wave is the maximum displacement of a point from its rest position.
hope you get it,
Answer:
F = 2.6 x 10⁻²² N
Explanation:
According to the Coulomb's Law, the force of attraction or repulsion between two charges is directly proportional to the product of the magnitudes of both the charges and inversely proportional to the square of the distance between them. The formula for the force is given as follows:
F = k q₁ q₂/r²
where,
F = Force of Attraction or Repulsion = ?
q₁ = magnitude of first charge = charge on electron = 1.6 x 10⁻¹⁹ C
q₂ = magnitude of second charge = charge on proton = 1.6 x 10⁻¹⁹ C
k = Coulomb's Constant = 9 x 10⁰ N m²/C²
r = distance between the charges = 885 nm = 8.85 x 10⁻⁷ m
Therefore,
F = (9 x 10⁹ N.m²/C²)(1.6 x 10⁻¹⁹ C)(1.6 x 10⁻¹⁹ C)/(8.85 x 10⁻⁷ m)²
<u>F = 2.6 x 10⁻²² N</u>
