# Problem: A projectile is fired from the top of a cliff of height h above the ocean below. The projectile is fired at an angle u above the horizontal and with an initial speed vi . (a) Find a symbolic expression in terms of the variables vi g and u for the time at which the projectile reaches its maximum height. (b) Using the result of part (a) find an expression for the maximum height hmax above the ocean attained by the projectile in terms of h vi g and u.

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A projectile is fired from the top of a cliff of height h above the ocean below. The projectile is fired at an angle u above the horizontal and with an initial speed vi . (a) Find a symbolic expression in terms of the variables vi g and u for the time at which the projectile reaches its maximum height. (b) Using the result of part (a) find an expression for the maximum height hmax above the ocean attained by the projectile in terms of h vi g and u.

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Projectile Motion: Positive Launch concept. If you need more Projectile Motion: Positive Launch practice, you can also practice Projectile Motion: Positive Launch practice problems.