# Intermediate

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**this course**at INTERMEDIATE level.

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- Question 1 of 51. Question
A ball is projected horizontally from the top of a hill with a velocity of 30ms-1. if it reaches the ground 5s later, the height of the hill is ________.

- Question 2 of 52. Question
A stone is projected upwards at an angle of 300 to the horizontal from the top of a tower of height 100m and it hits the ground at a point Q. If the initial velocity of projection is 100ms-1, calculate the maximum height of the stone above the ground.

- Question 3 of 53. Question
An anti-aircraft gun fires at an elevation of 45o at an enemy aircraft at 20,000m above the ground. At what speed must the cannon be shot to hit the plane at that height?

- Question 4 of 54. Question
A mango fruit dops to the ground from jthe top of a mango tree 40m tall. How long does it tak to reach the gound? (Take g= 10ms-2 and neglect air resistance)

- Question 5 of 55. Question
The time of flight for a projectile motion is given by the expression________.