Answer:
option B
Explanation:
The correct answer is option B
When the playground swing reaches the highest point the swing has high potential energy.
When the swing is at the bottom kinetic energy of the swing is maximum.
When the swing back down the potential energy at the top point of the swing is converted to the Kinetic energy.
so, U g --> K
Ug is the potential energy of the swing
K is the kinetic energy of the swing.
Answer:
F₁> F₂
Explanation:
For this exercise Newton's second law is used, in the adjoint we can see the unapplied forces in this exercise.
Y axis y
N- W = 0
in this axis there is no movement
X axis
F -fr = m a
as they indicate that the velocity is consonant the acceleration is worth zero
F - fr = 0
friction force has the expression
fr = μ N
fr = μ mg
we substitute
F = μ m g
by the time the block is stopped the deferred force is
F₁ = μ_s m g
when it begins to move the force should decrease to
F₂ = μ_k k m g
as the static coefficient is greater than the dynamic coefficient
F₁> F₂
I believe the blank would simply be behaviour adaptations. Behavioural adaptations are behaviours that organisms demonstrate to help them better survive and reproduce in a habitat. Hope that helps!!