The atoms that the electrons leave behind become positive ions<span>, and the interaction between such </span>ions<span> and valence electrons gives rise to the cohesive or binding force that </span>holds<span> the metallic crystal </span>together<span>.</span>
Answer:
The electromagnetic force tends to push the protons apart. (Like forces repel).
Explanation:
Answer
given,
mass of the jet airplane = 13500 kg
Force on the plane = 35700 N due north
force from wind = 15300 N in direction 80.0° south of west.
Force =
force by wind = N
= N
net force on the jet airplane(ma)
a = 1.54 m/s²
Answer:
a) v = 3.116 m / s, b) μ = 1.65 10⁻²
Explanation:
a) to find the velocity of the set, let's define a system formed by the person and the sled, so that the forces during the collision are internal and the moment is conserved
initial instant. Before the crash
p₀ = M v₀
final instant. After the crash
p_f = (M + m) v
the moment is preserved
M v₀ = (M + m) v
v =
let's calculate
v =
v = 3.116 m / s
b) for this part let's use the relationship between work and kinetic energy
W = ΔK
as the body has its final kinetic energy is zero
the work of the friction forces is
W = - fr x
the negative sign is because the friction forces always oppose the movement
let's write Newton's second law
Y axis
N - W_sled -W_person = 0
N = mg + M g
N = (m + M) g
X axis
fr = ma
the friction force has the expression
fr = μ N
fr = μ g (m + M)
we substitute
- μg (m + M) x = 0- ½ (m + M) v²
μ =
let's calculate
μ =
μ = 0.0165
μ = 1.65 10⁻²