32) This question gives us the initial speed and direction of a projectile and asks us to find out the time when a projectile makes a 20-degree angle with its original position. We can start by drawing out the situation.
Next, we can relate x to y with the tangent trigonometry function.
Using kinematics we can come up with a relation between x, y, and time. Remember that there is only acceleration in the y-direction.
Finally, by plugging this into our equation for tan(20°), we can come up with an equation where time is the only unknown.
Answer: C
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