Question

A sports car accelerates at a constant rate from rest to a speed of 90 km/hr in 8 s. What is its acceleration?

3.13 m/s2


4.22 m/s2


5.31 m/s2


6.67 m/s2


none of the above

Answer 1

The acceleration of the sports car is 3.13 m/s².

Step-by-step explanation:

The acceleration of the sports car can be calculated using the formula:

Acceleration = (Final velocity - Initial velocity) / Time

Converting the final velocity from km/hr to m/s:

Final velocity = 90 km/hr x (1000 m/1 km) x (1 hr/3600 s) = 25 m/s

Substituting the values into the formula:

Acceleration = (25 m/s - 0 m/s) / 8 s = 3.125 m/s²

Therefore, the acceleration of the sports car is 3.13 m/s².

Answer 2

none of the above

ignore,
answer too short