Answer:
22.5 m/s²
Step-by-step explanation:
The final velocity, initial velocity, distance traveled and acceleration are related by the equation
v² = u² - 2ad [1]
where
v = final velocity
u = initial velocity
a = acceleration
d = displacement
We can manipulate the above equation [1] to solve for a in terms of the other parameters
a = (v² - u²)/2d
Given v = 30 m/s, u = 0 m/s, d = 20 m.
a = (30² - 0²)/(2 x 20)
a = 900/40
a = 22.5 m/s²