What is the acceleration of a car if
the speed of the car has increased from 25
km per hour to 40 km per hour in one
minute
Answers
Answered by
71
GIVEN
What is the acceleration of a car if
the speed of the car has increased from 25 km per hour to 40 km per hour in one
minute .
SOLUTION
- Initial velocity (u) = 25 km/h
- Final velocity (v) = 40km/h
- Time taken (t) = 1min = 60s
- Acceleration (a) = ?
→ u = 25km/h
→ u = 25 × 5/18
→ u = 6.9 m/s
Now,
→ v = 40km/h
→ v = 40 × 5/18
→ v = 11.1 m/s
According to the first equation of motion
→ v = u + at
→ 11.1 = 6.9 + a*60
→ 11.1 - 6.9 = 60a
→ 4.2 = 60a
→ a = 4.2/60
→ a = 0.07 m/s²
Hence, acceleration of the car is
0.07m/s²
Answered by
44
Given:
- Initial velocity = 25 km/hr
- Final velocity = 40 km/hr
- Time taken = 1 minute
To Find:
- Acceleration of the car (a)
Conversions:
Solution:
Let the initial velocity be u and final velocity as v.
u = 25 km/hr = 25×5/18 = 125/18 m/s
v = 40 km/hr = 40×5/18 = 200/18 m/s
And,
Time taken (t) = 1 min = 60 seconds
Now,
Therefore, the acceleration of the car is 0.07 m/s ².
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