Respuesta :
Question:
A racing car is travelling at 70 m/s and accelerates at -14 m/s^2. What would the car’s speed be after 3 s?
Statement:
A racing car is travelling at 70 m/s and accelerates at -14 m/s^2.
Solution:
- Initial velocity (u) = 70 m/s
- Acceleration (a) = -14 m/s^2
- Time (t) = 3 s
- Let the velocity of the car after 3 s be v m/s
- By using the formula,
v = u + at, we have
[tex]v = 70 + ( - 14)(3) \\ = > v = 70 - 42 \\ = > v = 28[/tex]
- So, the velocity of the car after 3 s is 28 m/s.
Answer:
The car's speed after 3 s is 28 m/s.
Hope it helps
