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choli [55]
3 years ago
8

Kim took 5 hours to complete a journey with an average speed

Physics
1 answer:
monitta3 years ago
6 0

Answer:110

Explanation:

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If a train going 60 m/s hits the brakes, and it takes the train 85 seconds to stop, what is
Anvisha [2.4K]

Question :-

  • If a Train going with 60 m/s Speed hits the Brakes, and takes 85 sec to stop. What is the Acceleration of the Train ?

Answer :-

  • Acceleration of Train is 0.70 m/s² .

Explanation :-

As per the provided information in the given question, we have been given that the Speed of the Train is 60 m/s . Time taken to stop the Train is 85 sec . And, we have been asked to calculate the Acceleration of the Train .

For calculating the Acceleration , we will use the Formula :-

\bigstar \:  \:  \:  \boxed { \sf{ \: Acceleration \:  =  \:  \dfrac{v \:  -  \: u}{t} \:  }} \\

Where ,

  • V denotes to Final Velocity .
  • U denotes to Initial Velocity .
  • T denotes to Time Taken .

Therefore , by Substituting the given values in the above Formula :-

\dag \:  \:  \:  \:  \sf{Acceleration \:  =  \:  \dfrac{Final  \: Velocity \:  -  \: Initial \: Velocity}{Time} } \\

\longmapsto \:  \:  \: \sf{Acceleration \:  =  \:  \dfrac{0 \:  -  \: 60}{85} } \\

\longmapsto \:  \:  \: \sf{Acceleration \:  =  \:  \dfrac{60}{85} } \\

\longmapsto \:  \:  \: \textbf {\textsf {Acceleration \:  =  \: 0.70 }}

Hence :-

  • Acceleration = 0.70 m/s² .

\underline {\rule {210pt} {4pt}}

Note :-

  • Kindly Scroll the Screen from Right to Left for Better View .
7 0
2 years ago
Read 2 more answers
Two 8V batteries are set up with four light bulbs in a complex circuit. Light bulb A has a resistance of 4.00 Ω, light bulb B ha
Neko [114]

Answer:

Total resistance : 12.4

Total Current : 0.645

Explanation:

4 0
3 years ago
Carole is very tired and makes coffee. why would newton say that she must use her hand to put up the cup
Marat540 [252]
<span>newton say that she must use her hand to put up the cup because the work is equal to force times it distance, that is in the same direction of the force applied. if carole used her hand to put up the cup, then he is not applying any work because the displacement is not in the same direction of the force</span>
5 0
3 years ago
Read 2 more answers
Why are you teachers regarded as professionals​
Murljashka [212]

Answer:

coz teaching is their profession.

3 0
3 years ago
A small marble attached to a massless thread is hung from a horizontal support. When the marble is pulled back a small distance
s2008m [1.1K]

Answer:

f' = 2 f

Explanation:

The frequency of the pendulum that swings in simple harmonic motion is given by :

f={2\pi}\sqrt{\dfrac{l}{g}}

Where

l is the length of pendulum

g is the acceleration due to gravity

If the length of the thread is increased by a factor of 4, such that, l' = 4 l, let f' is the new frequency such that,

f'={2\pi}\sqrt{\dfrac{l' }{g}}

f'={2\pi}\sqrt{\dfrac{4l}{g}}

f'=2\times {2\pi}\sqrt{\dfrac{l}{g}}

f' = 2 f

So, the new frequency of the pendulum will become 2 time of initial frequency. Hence, the correct option is (b) "2f"

3 0
3 years ago
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