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24-07-2021
Physics

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A one tonne crane increases its speed from 30km/h to 108km/h in 35 seconds. Calculate the change in momentum

Respuesta :

ANUSARA ANUSARA

24-07-2021

Answer:

21.67kgms-1

Explanation:

30kmh-1 = ( 30× 1000) ÷ 3600 = 8.33 ms-1

108 Kmh-1 = (108 × 1000) ÷ 3600 = 30ms-1

change in momentum = ∆mv

= 1000000 kg ( 30 -8.33) ms-1

= 21.67 ×10^6 kgms-1

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