Which describes how the same force affects a small mass and a large massA.The large mass accelerates faster
B.The small mass accelerates faster
C.Both accelerate at the same time

Answers

Answer 1

Answer: The same force accelerates a small mass faster than
it accelerates a large mass.

It's easier to get a little red wagon going by pushing it
than it is to get a school bus going by pushing it.

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1. Sometimes in very cold places water pipes burst. Give reason why.

Answers

Water is the only known substance that gets BIGGER when it freezes.
That's why ice cubes float in liquid water, and the reason that pipes
or cans of soda spring leaks when the liquid water that they're full of
freezes and gets bigger.

When is very cold, water freezes in pipes expanding and turns into ice. This frozen water is expanding and bursting pipe.

The city police are in pursuit of Robin Banks after his recent holdup at the savings and loan. The high-speed police chase ends at an intersection as a 2080-kg Ford Explorer (driven by Robin) traveling north at 22.6 m/s collides with a 18400-kg garbage truck moving east at 10.4 m/s. The Explorer and the garbage truck entangle together in the middle of the intersection and move as a single object. Determine the post-collision speed and direction of the two entangled vehicles.

Answers

Answer:

$v=9.6215m/s\n\theta=13.8^o$

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 = $m_F$ = 2080 kg

Mass of truck = $m_T$ = 18400 kg

Velocity of Ford = $v_F$ = 22.6 m/s north

Velocity of truck = $v_T$ = 10.4 m/s east

Let us break up the velocity vector into 2 components, one along north ( $v_N$ ) and one along east ( $v_E$ ).

Therefore,

$v_N=(m_Fv_F_(north)+m_Tv_T_(north))/(m_F+m_T) =((2080*22.6)+(18400*0))/(2080+18400) =2.2953m/s$

(speed of truck along the north is zero)

Similarly,

$v_E=(m_Fv_F_(east)+m_Tv_T_(east))/(m_F+m_T) =((2080*0)+(18400*10.4))/(2080+18400) =9.3437m/s$

(speed of Ford along the east is zero)

Hence, the resultant speed of the entangled cars is given by,

$v=√(v_N^2+v_E^2) =√(2.2953^2+9.3437^2)m/s=9.6215 m/s$

and the direction is given by (please refer to the figure attached),

$\theta=tan^(-1)((v_N)/(v_E) )=tan^(-1)((2.2953)/(9.3437) )=13.8^o$

Final answer:

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.

Explanation:

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.

Learn more about Momentum Conservation here:

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Which model of earth's interior does this image show? if u answer i'll give u a thanks

Answers

It shows the inner core, core, mantle, and crust

Final answer:

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.

Explanation:

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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Which is NOT a characteristic of a magnetic field produced by a current?a. It can be turned on and off.
b. Its direction can be reversed.
c. Its strength can be changed.
d. Its speed can be slowed.

Answers

The answer is (D.) Its speed can be slowed because the magnetic field can be turned on and off, can have its direction reversed and can have its strength changed. However, The speed of a magnetic field that is produced by a current is impossible to 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).

A 1.7-kg block of wood rests on a rough surface. A 0.011-kg bullet strikes the block with a speed of 670 m/s and embeds itself. The bullet-block system slides forward 2.4 m before coming to rest.