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10-02-2020
Physics

contestada

m=2450kg
V=72km/h
Ek=?

Respuesta :

10-02-2020

Answer:

490,000J

Explanation:

Mass(M)=2450kg

Velocity (V) =72km/h

Converting from km/h to m/s:

(72km)* (1000m) * (1h)/(3600s)*(1km)(1h)

Km and h cancel out:

V= 20m/s

Kinetic energy (Ek)=?

Ek=1/2MV^2

Ek=1/2 * (2450kg) * (20m/s)^2

Ek=490,000J

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