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Home/bus is travelling at 36 km h⁻¹ when the driver

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Ayushree
Ayushree
Asked: August 18, 2026In: Class 9 Science

A bus is travelling at 36 km h⁻¹ when the driver sees an obstacle 30 m ahead. The driver takes 0.5 seconds to react before pressing the brake. Once the brake is applied, the velocity of the bus reduces with constant acceleration of 2.5 m s⁻². Will the bus be able to stop before reaching the obstacle?

The bus speed is 10 m s⁻¹. During reaction, it travels 5 m. Braking distance = 10²/(2 × 2.5) = 20 m. Total stopping distance = 25 m, less than 30 m. Yes, it stops safely.

bus is travelling at 36 km h⁻¹ when the driverclass 9 new curriculum 2026 science chapter 4 solutionclass 9 new syllabus describing motion around us – solutiondescribing motion around us chapter 4 question answer (2026-27)will the bus be able to stop before reaching
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    Kriti added an answer An object kept on the Earth can be considered at… August 19, 2026 at 4:04 am
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    Kriti added an answer The initial speed is 36 km h⁻¹ = 10 m… August 19, 2026 at 4:04 am
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    Kriti added an answer Given, initial speed u = 54 km h⁻¹, final speed… August 19, 2026 at 4:04 am
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    Kriti added an answer The correct options are (i) and (ii). Both A and… August 19, 2026 at 4:04 am

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