Answer:
The acceleration is

Step-by-step explanation:
Use the equation of motion,

where u=0m/s is the initial speed, v=9m/s is the final speed and t=2 seconds is the time.
We substitute the values into the equation and solve for the acceleration, a

This means that;

Divide both sides by 2 to get:


Answer:
115 degrees
Step-by-step explanation:
first find the missing angle in the triangle
75+40+x=180
x+115=180
x=65
That angle plus the ? angle form a straight line, meaning they add up to 180 degrees.
so 65+x=180
x=115