Question

A 900kg compact car is movin at a certain speed if its kinetic energy is 320000 j find the velocit at which car is travelling

Answer 1

Hey mate... ^_^

Here is ua answer... ⏬⏬

Mass = m = 900kg

K.E = 320000J = 320×10³J

Velocity = v = ?

K.E = mv²/2

2×K.E = mv²

2×320×10³ = 9×10²×v²

640×10³/9×10² = v²

640×10^3-2/9 = v²

640×10¹/9 = v²

64×10²/9 = v²

√64×10²/9 = v

8×10/3 = v

80/3 = v

26.67m/s = v
______________________
So, car's velocity is 26.67m/s


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