jplily2314
jplily2314 jplily2314
  • 11-10-2019
  • Physics
contestada

How long does a car (1000 kg) have a speed of 30 m/s from a rest if the engine power is 10kw

Respuesta :

Stefanisaska
Stefanisaska Stefanisaska
  • 04-01-2020

Answer: 90.1 s

Explanation:

Use equation for power:

P=F*V

Use eqation for force:

F=ma

F---force

V---velocity

Vr=om/s

V=30m/s

m=1000kg

P=10000W

---------------------------

P=FV

F=P/V

F=10000W/30m/s

F=333.33N

Use equation for force to find accelartaion.

F=ma

a=F/m

a=333.33N/1000kg

a=0.333 m/s²

Use equation for accelaration to find out time:

a=(V-Vs)/t

t=(V-Vs)/a

t=(30m/s)/(0.333m/s²)

t=90.09 s≈90.1 s

------------------------

Answer Link

Otras preguntas

Mary has 12 marbles 3/12 of the marbles are yellow and 2/12 of the marbles are blue.The rest of the marbles are green.How many marbles are green?
How do I write n+5n= 12c-c= and -4j-1-4j+6= in simplest form?
When you whisper, you produce a 10-dB sound. a. When you speak quietly, your voice sounds twice as loud as a whisper. How many decibels is this? b. When you spe
WHERE DID MOST AMERICANS LIVE IN THE EARLY 1800S
is a pictograph is a character that represent an idea true or false
Which requires the removal of heat, melting or freezing?Is it evaporation? What is it? Why?
help calculate 6x+14=32
Four things that were damaged ween mount etna erupted were
The sum of Alan’s age and Bob’s age is 40. The sum of Bob’s age and Carl’s age is 34. The sum of Alan’s age and Carl’s age is 42. How old is Bob?
Use elimination to solve the system:6x-4y=6-6x+3y=0