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- A car accelerates uniformly from 18 km/h to 36 km/h in 5 minutes. The acceleration is
A car accelerates uniformly from 18 km/h to 36 km/h in 5 minutes. The acceleration is
Learn about the consistent acceleration of a car, propelling it from 18 km/h to 36 km/h over a period of 5 minutes.
by Maivizhi A
Updated Feb 24, 2024
A car accelerates uniformly from 18 km/h to 36 km/h in 5 minutes. The acceleration is
The acceleration of the car is 216 km/h^2.
Read more at: https://edurev.in/question/1640705/A-car-accelerates-uniformly-from-18kmh-to-36kmh-in-5-minute--The-acceleration-is--
To find the acceleration of the car, we need to first convert the initial and final velocities from km/h to m/s since acceleration is typically measured in meters per second squared (m/s²).
When using the formula for acceleration:
a = (v - u) / t
Substituting the given values:
a = (36 - 18) / (1/12)
This simplifies to:
a = 18 / (1/12)
To divide by a fraction, we multiply by its reciprocal:
a = 18 * (12/1) = 216
However, the units are incorrect. Acceleration is typically measured in meters per second squared (m/s²), not kilometers per hour squared (km/h²). To convert from km/h² to m/s², we need to use the appropriate conversion factor. Since 1 km/h² = (1000/3600) m/s², we'll multiply by this factor to convert:
216 * (1000/3600) = 60
So, the acceleration of the car is 60 m/s².
How to Calculate Acceleration?
Acceleration is calculated using the formula:
a = (Δv) / (Δt)
Where:
- a = acceleration
- Δv = change in velocity
- Δt = change in time
If the initial velocity is vi and the final velocity is vf, then the change in velocity is:
Δv = vf - vi
So, the formula for acceleration can also be written as:
a = (vf - vi) / (Δt)
For example, if the initial velocity of an object is 20 m/s, the final velocity is 30 m/s, and the time it took to change velocity is 5 seconds, you can calculate the acceleration as follows:
Δv = vf - vi = 30 m/s - 20 m/s = 10 m/s
a = (Δv) / (Δt) = (10 m/s) / (5 s) = 2 m/s^2
So, the acceleration of the object is 2 m/s^2.
A car accelerates uniformly from 18 km/h to 36 km/h in 5 minutes. The acceleration is - FAQs
1. What is the acceleration of the car in this scenario?
The acceleration of the car is 60 m/s².
2. How did you determine the acceleration?
Acceleration was calculated using the formula a = (Δv) / (Δt), where Δv is the change in velocity and Δt is the change in time.
3. Why did you convert the velocities from km/h to m/s?
Acceleration is typically measured in meters per second squared (m/s²), so converting velocities to m/s was necessary for accurate calculation.
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