There were 14 fans a Tracy's baseball game. The home team had 4 more fans than the
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Here we know that the initial velocity of the car is given by:
And the final velocity of the car is given by:
It took 3 seconds to attain the final velocity, so we have
Therefore, the acceleration can be obtained by:
Plugging the values of the initial, final velocity and the time, we get:
So the acceleration of the car is given by:
Now we need to find the direction of the average acceleration of the car:
Here, x and y are the coefficients of the 'x' and 'y' components of the vector:
Therefore, the direction of the average acceleration of the car is .
Trial and error specifies that you should guess the value of m and see if you aimed too low too high then adjust your next guess based on that.
Suppose we don't already know what m is (even though it is completely obvious), let's pick m to be 6,
So we check, but
which means m must be bigger.
So we pick m to be 8 and check, but
which means m must be smaller.
Since only natural number between 6 and 8 is 7 we pick m to be 7 and check, and
.
The answer is therefore 7.
Hope this helps :)