Recall Newton's second law:
F = ma
F is the force exerted on the object.
m is the mass of the object.
a is the acceleration of the object.
Given values:
F = 75 N
m = 15 kg
Substitute the terms in the equation with the given values and solve for a:
75 = 15×a
<h3>a = m/s²</h3>
Standard sea level pressure by definition equals 760 mm (29.92 inches) of mercury
Hooke's Law states that the force that the spring exerts on the mass in a mass-spring system is opposite of and proportional to the displacement of the mass from equilibrium. The statement is True.
<h3>What is force?</h3>
The force is an action of push or pull on any object to change the state of motion or rest.
The Hookes's law is related to the spring force. The force F is applied on the mass connected to spring to compress or extend it about the equilibrium position at distance x. When force is removed, the mass attached to the spring moves in opposite direction of force.
The larger the force, longer is the distance from equilibrium position. This concludes that the Hooke's law is correct.
Thus, the statement is True.
Learn more about force.
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You are given a star that is located 12.5 parsecs away from us (let us assume that the reference point is on earth). You are tasked to find the parallax angle. The equation to get the parallax angle is D = 2 (AU)/ tanФ wherein D is the distance of the star from the earth, AU is the distance of earth from the sun and Ф is the parallax angle. Note that 1 parsec = 1,000,000,000,000 million meters and that the distance of earth to the sun is about 149,600,000,000 meters.
D = 2 (AU)/ tanФ
tan Ф = 2 (AU)/D
Ф = tan⁻¹ [ 2(AU) / D]
Ф = tan⁻¹ [ 2(149,600,000,000) / 12,500,000,000,000]
Ф = 1.37°