Answer:
Explanation:
This problem is an example of a perfectly inelastic collision. After the collision, the two cars merge into a single object. So in order to find the velocity of that object, we need to find the velocity of the center of mass of the given system of 2 cars.
Mass of Ford = = 2080 kg
Mass of truck = = 18400 kg
Velocity of Ford = = 22.6 m/s north
Velocity of truck = = 10.4 m/s east
Let us break up the velocity vector into 2 components, one along north () and one along east ().
Therefore,
(speed of truck along the north is zero)
Similarly,
(speed of Ford along the east is zero)
Hence, the resultant speed of the entangled cars is given by,
and the direction is given by (please refer to the figure attached),
The post-collision speed and direction of the two entangled vehicles, calculated using principles of momentum conservation and trigonometry, are found to be 9.82 m/s and 76.4 degrees east of north respectively.
In this scenario, we are dealing with the principles of momentum conservation. In a collision like this one, the total momentum before the collision equals the total momentum after the collision, as long as no external forces are acting on the system. The momentum (p) of an object is calculated as the mass (m) of the object multiplied by its velocity (v), or p=mv.
Before the collision, the total momentum of the system (ptotal) is the sum of the momentum of the Ford Explorer (pExplorer) and the garbage truck (ptruck). After the collision, they move together as a single object, so their combined mass and velocity would make up the total momentum.
Based on the given information, pExplorer = 2080 kg * 22.6 m/s = 47,008 kg*m/s and ptruck = 18400 kg * 10.4 m/s = 191,360 kg*m/s. The direction should also be taken into account. Since they are perpendicular to each other, we can use the Pythagorean Theorem to find the resultant momentum: (pExplorer)^2 + (ptruck)^2 = ptotal^2, which gives a total momentum of 201,262.8 kg*m/s.
Now, the total mass (mtotal) of two entangled vehicles is 2080 kg + 18400 kg = 20480 kg. Hence the velocity (v) of the two vehicles after the collision is calulated by ptotal divided by mtotal : 201262.8 kg*m/s / 20480 kg = 9.82 m/s. The direction is calculated using trigonometrics such as tan(-1)(ptruck / pExplorer) which gives a direction of 76.4 degrees east of north.
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The student's question lacks an image, so a specific model can't be identified. However, a common model of Earth's interior includes four parts: the crust, mantle, outer core, and inner core. Each of these parts have distinct characteristics and they are made up of different materials.
Unfortunately, I'm not able to identify the specific model of Earth's interior based on your question as it doesn't include an image for me to review. However, I can tell you that commonly used models include the crust, mantle, outer core, and inner core model, based on our current understanding of geology. The crust is the surface layer, followed by the mantle which is the largest part of Earth's interior. Below the mantle are the outer core and the inner core, which are primarily made up of iron and nickel and exhibit different physical properties.
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b. Its direction can be reversed.
c. Its strength can be changed.
d. Its speed can be slowed.
Answer: The correct answer is "Its speed can be slowed".
Explanation:
The current carrying conductor produces the magnetic field. The electric current produces the magnetic field.
The motion of the charge produces the electric field and the magnetic field. If the charge is not moving then it will produce electric field only not magnetic field.
The rate of flow of charges constitutes the current. If the current is not flowing in the conductor then, the magnetic field will not produce. If the amount of current flow increases then the strength of the magnetic field increases.
The magnetic field can be produced by following methods from the given options :
It can be turned on and off.
Its direction can be reversed.
Its strength can be changed.
Therefore, the correct option is (d).
What is the coefficient of kinetic friction between the block and the surface? Express your answer using two significant figures.
Answer:
0.39
Explanation:
Given information
m1=1.7 Kg
m2=0.011 Kg
v2=670 m/s
d=2.4 m
m2v2=(m1+m2)v hence and also
The deceleration due to friction is given by
therefore
Therefore,