Ask question

Ask question

All categories

4 years ago

11

Hi! Can you help me? :) A satellite's speed is 10,000 m/s. After 1 min, it is 5,000 m/s. What is the satellite's acceleration? T

hanks!!

2 answers:

Kruka [31]4 years ago

7 0

<span>a = ΔV/Δt = (5000-10000)/60 = -500/6 = -83.(3) m/sec^2</span>

Novosadov [1.4K]4 years ago

5 0

Answer:

Acceleration, $a=-83.33\ m/s^2$

Explanation:

It is given that,

Initial speed of the satellite, u = 10000 m/s

Final speed of the satellite, v = 5000 m/s

Time taken, t = 1 min = 60 seconds

Acceleration of the satellite is given by :

$a=\dfrac{v-u}{t}$

$a=\dfrac{5000-10000}{60}$

$a=-83.33\ m/s^2$

So, the acceleration of the pumpkin is $-83.33\ m/s^2$ . Hence, this is the required solution.

You might be interested in

A loudspeaker, mounted on a tall pole, is engineered to emit 75% of its sound energy into the forward hemisphere, 25% toward the

Naily [24]

Answer:

"0.049 W" is the correct answer.

Explanation:

According to the given question,

$r = \sqrt{(3.5)^2+(2.5)^2}$

$=\sqrt{8.5}$

$SL=85$

As we know,

⇒ $SL=10 \ log(\frac{I}{I_o} )$

$85=10 \ log(\frac{I}{10^{-12}} )$

$I=3.162\times 1^{-4} \ W/m^2$

Now,

⇒ $P_{front} = I(2\pi r^2)$

$=(3.162\times 10^{-4})(2\pi\times 18.5)$

$=0.0368 \ W$

$=0.75 \ P$

or,

$=0.049 \ W$

7 0

3 years ago

Ezra (m = 20.0 kg) has a tire swing and wants to swing as high as possible. He thinks that his best option is to run as fast as

Dmitriy789 [7]

Answer:

a) $v=5.6725\,m.s^{-1}$

b) $h= 1.6420\,m$

Explanation:

Given:

mass of the body, $M=20\,kg$

mass of the tyre, $m=10\,kg$

length of hanging of tyre, $l=3.5m$

distance run by the body, $d=10m$

acceleration of the body, $a=3.62m.s^{-2}$

(a)

Using the equation of motion :

$v^2=u^2+2a.d$ ..............................(1)

where:

v=final velocity of the body

u=initial velocity of the body

here, since the body starts from rest state:

$u=0m.s^{-1}$

putting the values in eq. (1)

$v^2=0^2+2\times 3.62 \times 10$

$v=8.5088\,m.s^{-1}$

Now, the momentum of the body just before the jump onto the tyre will be:

$p=M.v$

$p=20\times 8.5088$

$p=170.1764\,kg.m.s^{-1}$

Now using the conservation on momentum, the momentum just before climbing on the tyre will be equal to the momentum just after climbing on it.

$(M+m)\times v'=p$

$(20+10)\times v'=170.1764$

$v'=5.6725\,m.s^{-1}$

(b)

Now, from the case of a swinging pendulum we know that the kinetic energy which is maximum at the vertical position of the pendulum gets completely converted into the potential energy at the maximum height.

So,

$\frac{1}{2} (M+m).v'^2=(M+m).g.h$

$\frac{1}{2} (20+10)\times 5.6725^2=(20+10)\times 9.8\times h$

$h\approx 1.6420\,m$

above the normal hanging position.

3 0

3 years ago

Sandra moves 14 m in 2 minutes. What is Sandra's average velocity (in m/s)?

tia_tia [17]

I would say B , not sure if its correct

5 0

4 years ago

Read 2 more answers

Which statement shows the difference between drug misuse and drug abuse?

saul85 [17]

Drug misuse is when someone takes medicine in an unintended way, while drug abuse is when a person uses drugs in an illegal way.

Explanation:

Drug misuse simply refers to the inappropriate use of drug for the wrong purpose. The use of drug meant for someone else is a misuse of drug. Drug misuse have serious consequences on the body system. It works like a wrong prescription by a pharmacist.

Drug abuse is the simply the act of not following the instruction guiding the use of the drug on the label. This can lead to overdose of the drug whereby too much quantity of the drug is consumed. Under-dose of the drug also implies that less amount of the drug is used as stated. Drug abuse is very dangerous act and it can lead to serious health defect and addiction problems.

It is simply an illegal way of using drugs.

Both drug misuse and abuse implies that drug use does not follow due medical instructions and consultation.

Learn more:

alcohol overdose brainly.com/question/6391303

#learnwithBrainly

6 0

4 years ago

What will happen to the astronaut when the jets produce these four forces: 10N, 10N, 9N, 9N?

sukhopar [10]

The astronaut would go the opposite direction due to Newton’s third law of -10N, -10N, -9N, -9N

Let me know if this helped you, please rank this was the brainlist answer if possible, thanks!

6 0

4 years ago