what is vector quantity​

Answer:

2.625 m/s

Explanation:

This is a momentum question. Momentum is conserved which means that all the starting momentum must be accounted for.

1.5 kg * 2 m/s + 2.5 kg * 3 m's = (1.5 + 2.5)kg * x m/s

3 kg m/s + 7.5 kg m/s = 4 kg * x

10.5 kg m/s = 4 kg x

10.5 / 4 = x

x = 2.625 m/s

inelastic means that after the collision, the masses stick together as though they were one.

Answer:

0.5m/s²

Explanation:

Given parameters:

Initial velocity  = 0m/s

Final velocity  = 5m/s

Time taken  = 10s

Unknown:

Acceleration of the bicycle  = ?

Solution:

Acceleration is the rate of change of velocity with time.

   Acceleration  = [tex]\frac{v - u}{t}[/tex]  

v is the final velocity

u is the initial velocity

t is the time taken

  Insert the parameters and solve;

     Acceleration = [tex]\frac{5-0}{10}[/tex]   = 0.5m/s²

Answer:

a. same

b. less

c. less

Explanation:

you can use the position, time, acceleration equation

xf=xi + vi*t+(at^2)/2

you can say the final distance will greater for X than Y

using acceleration for gravity a=9.81m/s^2

a.  both X and Y will have the same acceleration due to gravity

b. to solve for final speed vf=vi+gt

since the initial velocity is 0 and X will take longer to fall, Y will hit the ground with less speed

c. as mentioned before, X will take longer to fall; therefore Y will have less time of descent.

[tex] \LARGE{ \underline{\underline{ \purple{ \bf{Required \: answer:}}}}}[/tex]

GiveN:

To FinD:

Step-by-step Explanation:

Using the first Equation of motion,

⇒ v = u + gt

⇒ v = 9.8 + -9.8(1)

⇒ v = 0 m/s

The final velocity is hence 0 m/s.

Answer:

Without the ability to measure, it would be difficult for scientists to conduct experiments or form theories. Not only is measurement important in science and the chemical industry, but it is also essential in farming, engineering, construction, manufacturing, commerce, and numerous other occupations and activities.

Explanation:

Make sure to edit so you're not copy-writed and if this was helpful could I please get brain-list

Answer:

Hydrogen and helium

Answer:

1. iron, nickel, calcium, sodium, and magnesium

2. nuclear fusion

Explanation:

I googled it

Answer:

-47.04

Explanation:

Divide 12 m by 2.5 m/s which equals 4.8s

And then use 4.8s to multiply it with -9.8

4.8(-9.8)= -47.04 m/s

Hope this helped!! :)

The initial height of the pumpkin is 23.52m and the final vertical velocity of the pumpkin is 47.04 m/s.

Initial horizontal speed, u = 2.5 m/s

horizontal distance covered , d = 12m

So the time taken is:

t = d/u

t = 12/2.5 s

t = 4.8s

Now, the initial vertical speed, v = 0

So the vertical distance traveled by the pumpkin will be equal to the initial height of the pumpkin:

s = vt + ¹/₂gt²

s = 0.5 × 9.8 × 4.8 m

s = 23.52m

Final vertical velocity:

v' = v + gt

v' = 9.8 × 4.8 m/s

v' = 47.04 m/s

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Answer:

I think it's 3/4 or 25% i am not sure

Answer:

false here is why :)

Explanation:

Regular, moderate-intensity physical activity reduces the risk of developing coronary heart disease and can reduce the likelihood of dying from heart disease.

hope this helped.

Answer:

Force of kinetic friction, Fk = 6N

Explanation:

Given the following data;

Coefficient of kinetic friction, μ = 0.2

Normal force, Fn=30N

To find the Force of kinetic friction;

Mathematically, the force of kinetic friction is given by the formula;

Fk = μFn

Where;

Substituting into the equation, we have;

Fk = 0.2*30

Fk = 6N

Therefore, the force of kinetic friction is 6N.

A force that is present between two moving objects or surfaces is called kinetic friction. It is estimated in newtons (N) and is calculated by:

[tex]\rm F_{k} =\rm \mu _{\rm k} F_{n}[/tex]

Where, [tex]\rm F_{k}[/tex] = frictional force,  [tex]\mu _{\rm k}[/tex]  = coefficient, [tex]\rm F_{n}[/tex] = normal force.

The kinetic friction of the object is 6N.

The kinetic friction can be estimated as:

Given,

Substituting values in the formula:

[tex]\rm F_{k} =\rm \mu _{\rm k} F_{n}[/tex]

[tex]\begin{aligned}\rm F_{k} &= 0.2 \times 30\\\\\rm F_{k} &= 6 \rm N\end{aligned}[/tex]

Therefore, 6N is the frictional force.

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Answer:

c

Explanation:

5.3" (and any subsequent words) was ignored because we limit queries to 32 words.

My commute to school is a constant distance, but the time it takes to get there fluctuates owing to traffic.

If an object moves with respect to a reference frame, such as when a passenger travels to the back of an airliner or a professor moves to the right with respect to a whiteboard, the item's position changes.

This change in location is described as displacement.

My commute to school is a constant distance, but the time it takes to get there fluctuates owing to traffic,

The initial and the final position of the commute is the same, but the displacement varies with the route which affects my car's speed and where it is in line at stop lights.

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Answer:

D now go to ur good life :)

Explanation:

Answer:

blah

Explanation:

blah

Answer:

A real image.

Explanation:

A real image is formed by real interaction of rays, hence it is possible to project it on a screen. And where a virtual image is drawn via back tracing the path of reflected rays, hence they don't meet in reality.

Answer:

c

Explanation:

Answer:

I am pretty sure it is B My friend hope you are well

Explanation:

Answer:

B- It is a constant when the light is traveling in a vacuum.

Explanation:

"Light in a vacuum always travels at the same speed." Those additional three words in a vacuum are very important. A vacuum is a region with no matter in it. So a vacuum would not contain any dust particles (unlike a vacuum cleaner, which is generally full of dust particles)

Answer:

A - 25m/s

Explanation:

The velocity of the motorbike will be 25 m/s in order to ensure that the truck and the motor bike have the same kinetic energy.

The kinetic energy of the body is by the virtue of its motion.

Given is a large truck of mass 5000 kg which is travelling at 5.0 m/s and a motorbike that has a mass of 200 kg. Both the truck and the motor bike have the same kinetic energy.

The Kinetic energy of the truck will be -

E[T] = 1/2 mv² = 1/2 x 5000 x 25 = 2500 x 25 = 62500 joules

Then Kinetic energy of the motorbike will be -

E[M] = 1/2 x 200 x v²

E[M] = 100v² joules

Now-

E[T] = E[M]

100v² =  62500

v² = 625

v = 25 m/s

Therefore, the velocity of the motorbike will be 25 m/s in order to ensure that the truck and the motor bike have the same kinetic energy.

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the horizontal component of the golf ball's initial velocity is 47.92 m/s.

The given parameters;

initial velocity of the golf, v = 60 m/s

angle of projection of the golf, Ф = 37°

The horizontal component of the golf ball's initial velocity is calculated as follows;

[tex]v_0_x = v\times cos(\theta)\\\\[/tex]

[tex]v_0_x[/tex] = 60 m/s  x cos (37)

[tex]v_0_x[/tex] = 60 m/s x 0.7986

[tex]v_0_x[/tex] = 47.92 m/s

Thus, the horizontal component of the golf ball's initial velocity is 47.92 m/s.

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Complete Question

While john is traveling along a straight in interstate highway, he notices that the mile marker reads 242 km. John travels until he reaches the 147 km marker and then retraces his path to the 161 km marker. What is John's resultant displacement from the 242 km marker? How far has he traveled answer in units of km

Answer:

The resultant displacement [tex]\Delta x _{1 , 3} = 81 \ km[/tex]

The total distance traveled by john is  [tex]x_t =109 \ km[/tex]

Explanation:

From the question we are told that

      The first position of john from the finish point   is [tex]x_1 = 242 \ km[/tex]

       The second position of john from the finish point is   [tex]x_2 = 147 \ km[/tex]

        The third position of john from the finish point is [tex]x_3 = 161 \ km[/tex]

Generally the displacement from the 242 km  marker is mathematically represented as

          [tex]\Delta x _{1 , 3} = x_1 - x_3[/tex]

Here we used [tex]x_3[/tex] instead of  [tex]x_2[/tex] because [tex]x_3[/tex] is further than [tex]x_2[/tex] from the finish point

=>       [tex]\Delta x _{1 , 3} = 81 \ km[/tex]

Generally the total distance traveled by John is  mathematically evaluated as

         [tex]x_t = [x_1 - x_2 ] + [x_3 - x_2][/tex]

=>       [tex]x_t = [242 - 147 ] + [161 - 147][/tex]

=>       [tex]x_t =109 \ km[/tex]

Answer:

 fr ’= ½ F

Explanation:

For this exercise we use the translational equilibrium equation, on the axis parallel to the wall

              fr - W = 0

              fr = W

for the adult man they indicate that the friction force is equal to F

              F = M g

we write the equilibrium equation for the child

             fr ’= w’

             fr ’= m g

in the statement they tell us that the mass of the adult is 2 times the mass of the child

             M = 2m

we substitute

            fr ’= M / 2 g

            fr ’= ½ Mg

we substitute

            fr ’= ½ F

therefore the force of friction in the child is half of the friction in the adult

Answer  888990,0 kg

Explanation:

888990,0 kg is the mass of the object.

Any two mass-containing objects are attracted to one another by the gravitational force. Because it consistently attempts to pull masses together rather than pushing them apart, the gravitational force is known as attractive.

Newton's Universal Law of Gravitation is what it is known as.

Admittedly, you aren't pushing on those other objects all that much because you don't have a very large mass. Additionally, items that are very far apart from one another do not clearly tug on one another. 

Therefore, 888990,0 kg is the mass of the object.

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Answer:

That model grilfriend would probably only want me for the cash and would talk to a million other guys...but the baby orangutan would love me and I would be able to take care of a cute baby!!:)

Explanation:

Answer:

Food chain is a linear transfer of energy from the producer to the consumer

producer →primary consumer → secondary consumer → tertiary consumer while food web is the interconnection of two or more food chains

Answer:

-6.25 m/s

Explanation:

i took the quiz

Answer:

Ammeter

Explanation:

An ammeter is used to measure current.

Answer:

The final speed is 75 m/s

Explanation:

Constant Acceleration Motion

It's a type of motion in which the velocity of an object changes uniformly in time.

Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:

[tex]v_f=v_o+at[/tex]

The airplane comes from rest (vo=0) accelerating at a=25 m/s^2 for t=3 s.

The final speed is:

[tex]v_f=0+25~m/s^2\cdot 3~s[/tex]

[tex]v_f=75~m/s[/tex]

The final speed is 75 m/s

Answer:

x=36.5 m

Explanation:

Rectangular Components of a Vector

A vector can be expressed as an ordered pair (x,y) where x is the x-coordinate, and y is the y-coordinate of a rectangular system.

It can also be given as a magnitude-angle pair (r,θ) where θ is measured from the positive x-axis. It's also known as polar coordinates.

The conversion from polar to rectangular coordinates is:

[tex]x=r\cos \theta[/tex]

[tex]y=r\sin\theta[/tex]

We are given the vector as a magnitude r=47.3 m and at an angle θ=39.4°. The x-component of the vector is:

[tex]x=47.3\cos (39.4^\circ)[/tex]

Using a scientific calculator to find the trigonometric function:

[tex]x=47.3\cdot 0.7716[/tex]

x=36.5 m