Question

1. a) Mork while driving in his "Eggmobile" on the planet Ork drives off a cliff 500 m in height. If he was moving with a horizontal velocity of 100 m/s when he left the cliff, determine whether or not he will crash into Mindy who was at the time admiring Ork's landscape at a distance of 1100 m from the foot of the cliff. Show all calculations !

*NOTE: The gravitational field (acceleration due to gravity) on Ork is 0.5 that of the earth's gravitational field.

b) A cannon inclined at an angle of 30^o above the ground is firing cannon balls with an initial velocity of 50 m/s.

i) Determine the time required for the balls to reach the maximum height.

ii) The velocity of the balls 2.5 s after firing.

iii) If a physics student was contemplating gravity underneath an apple tree at a distance of 250 m from the cannon, determine whether or not he would get hit.

c) During a training exercise a cannon ball is fired with a muzzle velocity of 89.2 m/s at an angle of 45^o above the horizontal. Determine how fast the cannon ball will be moving just before it strikes the ground.

Answer 1