HELP ME PLEASE!!!!

A model rocket is launched straight upward with an initial speed of 50.0 m/s. It accelerates with a constant upward acceleration

Nonamiya [84]

Answer:

a)5m b)5secs c) 10secs

Explanation:

a) maximum height H = u²/2g

Given u = 50m/s

g = 10m/s²

H = 10²/20

H= 5m

maximum height reached by the rocket is therefore 5m

.b)Time it takes the rocket to reach its maximum height is Tmax = U/g

Tmax = 50/10

Tmax = 5seconds

c) How long the rocket spent in the air is the time of flight T

T = 2U/g

T = 2×50/10

T = 100/10

T = 10seconds

3 0

3 years ago

You are working in a biology lab and learning to use a new ultracentrifuge for blood tests. The specifications for the centrifug

Sloan [31]

Answer:

Yes, correct

Explanation:

velocity, v = 470 m/s

radius, r = 0.15 m

The radial acceleration is the centripetal acceleration which always acts towards the centre of the circular centrifuge.

The formula for the centripetal acceleration is given by

$a =\frac{v^{2}}{r}$

$a =\frac{470^{2}}{0.15}$

a = 1472666.667

a = 150272.1 g

According to the question, we can get the acceleration as mentioned. So the claim is correct.

7 0

2 years ago

Read 2 more answers

A 2.0 kg wood block is launched up a wooden ramp that is inclined at a 30° angle. The block’s initial speed is 10 m/s. What vert

Romashka [77]

Answer:

Vertical Height = 0.784 meter, Speed back at starting point = 10 m/s

Explanation:

Given Data:

V is the overall velocity vector, $Vi$ and $Ui$ are its initial vertical and horizontal components

$R = 10 m/s\\ Projection Angle (theta) = 30 degrees\\Vi = 10*sin(30) = 5 m/s\\Ui = 10*cos(30) = 8.66 m/s$

To find:

Max Height $h$ achieved

Calculation:

1) Using the $3^{rd}$ equation of motion, we know

$2*a*s = Vf^{2} - Vi^{2}$

2) In terms of gravity $g$ height $h$ and the vertical component of Velocity $Vf , Vi$ .

3) As $Vf = 0$ as at maximum height the vertical component of velocity is zero maximum height achieved

$2*g*h = Vf^{2} -Vi^{2}$

putting values

4) $h = 0.784 m/s$

5) As for the speed when it reaches back its starting point, it will have a speed similar to its launching speed, the reason being the absence of air friction (Air drag)

3 0

3 years ago

The lightning bolt discharge lasts one millisecond. What is the average current flowing from the cloud to ground? Answer in unit

denpristay [2]

Answer:

25100A

Explanation:

t= 1ms = 0.001s

q = 25.1C

From the relationship between charge and current , the charge is equal to the product of current and time

q = i×t

Where q = charge

i = current

t = time

i = q/t = 25.1/0.001

i = 25100A.

5 0

2 years ago

Which of the following shows the correct order in which organs take part in the process of digestion? Large intestine, small int

AysviL [449]

<span>Large intestine, small intestine, rectum is the correct order.</span>

4 0

3 years ago

Read 2 more answers