Let me restate the answers based on the data you provided:

1. Height after 0.1 seconds:

   • The coin will be at a height of approximately $2.02 \, \text{meters}$ from the ground after $0.1 \, \text{seconds}$.

2. Maximum height:

   • The coin will reach a maximum height of approximately $2.85 \, \text{meters}$ from the ground, assuming air resistance is ignored.

3. Time on air:

   • The total time the coin will be in the air before returning to its initial position is approximately $1.02 \, \text{seconds}$.

Would you like further clarification on any specific part of these calculations, or have any additional questions?

Here are 5 related questions:

1. How can you calculate the speed of the coin after a specific time interval?
2. How would the results change if the coin were tossed at an angle instead of straight up?
3. What would happen if the height from which the coin was tossed was doubled?
4. How would the time of flight change if gravity was weaker, for example, on the Moon?
5. How do you calculate the total energy of the coin at its maximum height?

Tip: To calculate how high a projectile will go, focus on the time when the upward velocity equals zero, as that's when it reaches its peak height.