Answer:
The equatiom of kinetic energy is 1/2×m×v² where m represents mass and v is velocity :
The unit for kinetic energy is measured in Joules (J).
What statement is true about a spring?
2 answers:
Answer:
B. The stiffer the spring, the greater the force required to restore its position.
Explanation:
The 'restoring force' (the force required to restore the position of a spring) is given by:
where
F is the restoring force
k is the spring constant, which determines its stiffness (the higher the value of k, the stiffer the spring)
x is the displacement of the spring relative to its natural length
From the formula, we see that the higher the value of k (so, the stiffer the spring), the larger the restoring force, so the correct option is
B. The stiffer the spring, the greater the force required to restore its position
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To solve this problem it is necessary to apply the equation related to the Gravitational Force, the equation describes that
Where,
G = Gravitational Universal Constant
M = Mass of Earth (or Bigger star)
m = Mass of Object (or smallest star)
r = Radius
From the statement we know that once the impact is made, the golf ball is subjected to the forces that are exerted in nature. Since the air resistance, which would represent the drag force, is ignored. Only the forces related to gravity remain.
The gravitational force carries 'pushes' or 'attracts' the body towards the earth, while the speed decreases as it reaches its maximum height.
When the ball has reached its maximum height only the force of gravity begins to act on it, generating the attraction to the earth in parabolic motion.
Therefore the correct answer is B.