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Alisiya [41]
3 years ago
15

A 1,000 kg car has 50,000 joules of kinetic energy. What is it’s speed

Physics
2 answers:
muminat3 years ago
8 0

K.E= 50,000 Joules= 1/2mv^2=1/2x1,000kgxv^2

v^2=2x50,000 Joules/1,000kg = 100m^2/v62

v=10m/s

The speed of the car is 10 m/s

garri49 [273]3 years ago
7 0

Answer:

½mv²= KE  

½(1000)?²= 50000

500*?²= 50000

/500            /500

? ²=100

Square root  

?= 10

10 m/s is you answer

<u><em>g</em></u><u><em>ood luck</em></u>

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A. Using the third equation of motion:
v2 = u2 + 2as
from the question;
the jet was initially at rest
hence u = 0
a = 1.75m/s2
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v2 = 02 + 2(1.75)(1500)
v2 = 5250
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b. s = ut + 1/2at2
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1500 × 2 = 2× 1/2(1.75)t2
3000 = 1.75t2
1714.29 = t2
41.4 = t
hence the time taken for the plane to down the runway is 41.4s.


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