A car weighing 1 ton moves at a speed of 72 km / h. Determine how long it will take to stop if you turn off the engine.
| December 17, 2020 | education
A car weighing 1 ton moves at a speed of 72 km / h. Determine how long it will take to stop if you turn off the engine. Average force of resistance to movement 200H
Given: m = 1000kg V0 = 72kg / h = 20m / s Fc. = 200N V = 0
Find: t
Decision:
ma = Fc a = Fc / m => a = 200H / 1000kg = 0.2m / s ^ 2 0 = V0-at t = V0 / a = 20 (m / s) / 0.2 (m / s ^ 2 ) = 100s
Answer: 100 s.
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