Backlighting is used to create silhouettes
HOPED I HELPED
<em>The displacement of an object during a specific unit of time: </em>Velocity (the direction is part of displacement.)
<em>How fast or slow an object is moving and in what direction: </em>Velocity (speed & direction)
<em>How fast or slow an object is moving: </em>Speed (no direction)
<em>A cheetah running 97 km/h: </em>Speed (no direction)
<em>A train traveling 45 m/s north: </em>Velocity (speed & direction)
The kinetic energy will increase
Answer:
a) F = 1.26 10⁵ N, b) F = 2.44 10³ N, c) F_net = 1.82 10³ N directed vertically upwards
Explanation:
For this exercise we must use the relationship between momentum and momentum
I = Δp
F t = p_f -p₀
a) It asks to find the force
as the man stops the final velocity is zero
F = 0 - p₀ / t
the speed is directed downwards which is why it is negative, therefore the result is positive
F = m v₀ / t
F = 63.5 7.89 / 3.99 10⁻³
F = 1.26 10⁵ N
b) in this case flex the knees giving a time of t = 0.205 s
F = 63.5 7.89 / 0.205
F = 2.44 10³ N
c) The net force is
F_net = Sum F
F_net = F - W
F_net = F - mg
let's calculate
F_net = 2.44 10³ - 63.5 9.8
F_net = 1.82 10³ N
since it is positive it is directed vertically upwards
Answer:
coal as a fuel source led to the invention of the printing press i think
