**Answer:**

(a). The height of the cliff is 41.67 m.

(b). The maximum height of the ball is 41.67 m

(c). The ball's impact speed is 16.52 m/s.

**Explanation:**

**Given that,**

Speed = 33 m/s

Angle = 60°

Time = 3.0 sec

**(a). We need to calculate the height of the cliff**

**Using equation of motion**

Put the value into the formula

**(b). We need to calculate the maximum height of the ball**

**Using formula of height**

Put the value into the formula

**(c). We need to calculate the vertical component of velocity of ball**

**Using equation of motion**

Put the value into the formula

**We need to calculate the horizontal component of velocity of ball**

**Using formula of velocity**

Put the value into the formula

**We need to calculate the ball's impact speed**

**Using formula of velocity**

Put the value into the formula

**Hence, (a). The height of the cliff is 41.67 m.**

**(b). The maximum height of the ball is 41.67 m**

**(c). The ball's impact speed is 16.52 m/s.**