Answer:
Explanation:
We are given that
Mass of boat=m=214 kg
F=1310 N
We have to find the acceleration of the boat.
Net force=mg-F=mg-1310
Where
We know that
Acceleration ,a
Using the formula
Hence, the acceleration of the boat=
To determine how far the car goes, we have to know the distance covered by the 75 revolutions of the tires of the car. To do this, we have to calculate for the perimeter of the tire, then multiply it to the number of revolutions.
Distance =
where pi*d is the circumference of the tire
Distance = 75 * pi * 0.90 m
Distance = 212.06 m
The car covers a distance of
212.06 m as it slows down.
Answer:
The heights of the tides change over the course of a month due to -
<u>the position of Sun , Moon and Earth .</u>
Explanation:
Tides are formed due to the gravitational attraction of the sun and the moon on the surface of the Earth .
Since , the Moon is closer to Earth as compared to the Sun , Hence , Moon has greater attraction on Earth than Sun .
Moon plays an important role for producing the Tides .
In every 27.3 days , the Earth and the Moon revolves around the common point .
Therefore , in every 27.3 days , a new tidal cycle forms .
Two types of tides are possible , high tide and low tides .
In a day , two high tide and two low tide occurs ,
And because of the angle of Moon with respect to Earth , the two high tides do not have the same height . same for the case of two low tide .
The height of tides differ in the height on a daily basis .
Speed must an electron have if its momentum is to be the same as that of an x-ray photon with a wavelength of 0. 85 nm is 8.6*10^5m/s.
To find the answer, we have to know about the energy of photon.
<h3>What is the speed of the electron here?</h3>
- As we know that the momentum of an x-ray photon with a wavelength w,
where; h is the plank's constant.
- Thus, the momentum will be,
- We have to find the speed of the electron, thus, we have the expression of linear momentum as,
Thus, we can conclude that, speed must an electron have if its momentum is to be the same as that of an x-ray photon with a wavelength of 0. 85 nm is 8.6*10^5m/s.
Learn more about the energy of photon here:
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<h2>Isaac Newton's First Law of Motion states, "A body at rest will remain at rest, and a body in motion will remain in motion unless it is acted upon by an external force." What, then, happens to a body when an external force is applied to it? That situation is described by Newton's Second Law of Motion. </h2><h2>
equation as ∑F = ma
</h2><h2>
</h2><h2>The large Σ (the Greek letter sigma) represents the vector sum of all the forces, or the net force, acting on a body. </h2><h2>
</h2><h2>It is rather difficult to imagine applying a constant force to a body for an indefinite length of time. In most cases, forces can only be applied for a limited time, producing what is called impulse. For a massive body moving in an inertial reference frame without any other forces such as friction acting on it, a certain impulse will cause a certain change in its velocity. The body might speed up, slow down or change direction, after which, the body will continue moving at a new constant velocity (unless, of course, the impulse causes the body to stop).
</h2><h2>
</h2><h2>There is one situation, however, in which we do encounter a constant force — the force due to gravitational acceleration, which causes massive bodies to exert a downward force on the Earth. In this case, the constant acceleration due to gravity is written as g, and Newton's Second Law becomes F = mg. Notice that in this case, F and g are not conventionally written as vectors, because they are always pointing in the same direction, down.
</h2><h2>
</h2><h2>The product of mass times gravitational acceleration, mg, is known as weight, which is just another kind of force. Without gravity, a massive body has no weight, and without a massive body, gravity cannot produce a force. In order to overcome gravity and lift a massive body, you must produce an upward force ma that is greater than the downward gravitational force mg. </h2><h2>
</h2><h2>Newton's second law in action
</h2><h2>Rockets traveling through space encompass all three of Newton's laws of motion.
</h2><h2>
</h2><h2>If the rocket needs to slow down, speed up, or change direction, a force is used to give it a push, typically coming from the engine. The amount of the force and the location where it is providing the push can change either or both the speed (the magnitude part of acceleration) and direction.
</h2><h2>
</h2><h2>Now that we know how a massive body in an inertial reference frame behaves when it subjected to an outside force, such as how the engines creating the push maneuver the rocket, what happens to the body that is exerting that force? That situation is described by Newton’s Third Law of Motion.</h2><h2 />