First let us calculate for the angle of inclination using
the sin function,
sin θ = 1 m / 4 m
θ = 14.48°
Then we calculate the work done by the movers using the
formula:
W = Fnet * d
So we must calculate for the value of Fnet first. Fnet is
force due to weight minus the frictional force.
Fnet = m g sinθ – μ m g cosθ
Fnet = 1,500 sin14.48 – 0.2 * 1,500 * cos14.48
Fnet = 84.526 N
So the work exerted is equal to:
W = 84.526 N * 4 m
<span>W = 338.10 J</span>
Action: you muscles exert force that acts on the bunching bag. The bag on the other hand exerts force of reaction directed in a same line with the force exerted by your fist.
The basketball acts on the rack with force of its weight (in this case we can say it equals basketball's force of gravity), and the rack acts on the ball with the normal force.
A. CORRECT.
A very thin rotor decreases the effectiveness in the braking system. It cannot withstand heat and can cause quick wearing and fading of brake parts.
B. INCORRECT
Air in the hydraulic system can only make brake pedal soft and spongy. Pulsation in brake pedals is as a result of worn out or unevenly brake pads.
The forces that attract the sun and the planet toward
each other are described almost exactly by Newton's
law of universal gravitation.
In order to derive the existence of orbits, you also need
Newton's second law of motion.
Once you have properly mashed and massaged these two
laws together on paper, you GET Kepler's law of ellipses,
plus Kepler's other two laws of planetary motion.
It's really a beautiful math exercise and experience.
The agreement is so perfect that it gives you, right there on
your paper, powerful powerful arguments for the correctness
and accuracy of both Kepler's laws AND Newton's laws.
(But not proofs. They're all "only theories".)
The resultant force of the three professional wrestlers on the championship belt is 98.35 N.
<h3>
Component of the forces in x - direction</h3>
The component of the forces in x -direction is calculated as follows;
Fx = 40 N + 60(cos 36.9)
Fx = 40 N + 47.98 N
Fx = 87.98 N
<h3>
Component of the forces in y - direction</h3>
The component of the forces in y -direction is calculated as follows;
Fy = -80 N + 60(sin 36.9)
Fy = -43.95 N
<h3>Resultant force</h3>
R = √Fx² + Fy²
R = √( 87.98² + 43.95²)
R = 98.35 N
Thus, the resultant force of the three professional wrestlers on the championship belt is 98.35 N.
Learn more about resultant force here: brainly.com/question/25239010
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