A car is travelling with uniform acceleration along a straight road. The road has marker posts every 100 m. When the car passes one post, it has a speed of 10 m s–1 and, when it passes the next one, its speed is 20 m s–1. What is the car’s acceleration?
A. 0.67 m s–2 B. 1.5 m s–2 C. 2.5 m s–2 D. 6.0 m s–2
Answers
Answered by
1
Answer:
1 = 10
- initial speed
2 = 20
- final speed
= 200 - distance
Equation for speed:
2 = 1 + ∗ => =
2−1
– time of motion
Equation for distance:
=
1+2
2
Substitute t:
=
2
2−1
2
2
Therefore:
=
2
2−1
2
2
=
202−102
2∗200
=
300
400
= 0.75 /
2
Answer: = 0.75 /
2
Answered by
0
Answer:
the car acceleration is 0.75m/s2
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