(i) 10 m (ii) 20 m (iii) 40 m (iv) 80 m (c) The maximum potential energy of the object if its mass is 200g 1 mark

(i) 100 J (ii) 120 J (iii) 160 j (iv) 200 J

(d) In the given graph the total mechanical energy will be 1 mark

(i) Same (ii) increases (iii) decreases (iv) will be zero.

(e) In the given graph the kinetic energy 1 mark

(i) Same (ii) increases (iii) decreases (iv) increases then decreases.

Your starship, the aimless wanderer, lands on the mysterious planet mongo. as chief scientist-engineer, you make the following measurements: a 2.50-kg stone thrown upward from the ground at 14.0 m/s returns to the ground in 5.70 s ; the circumference of mongo at the equator is 2.20×10^5 km ; and there is no appreciable atmosphere on mongo. (a) the starship commander, captain confusion, asks for the following information: what is the mass of mongo? (b) if the aimless wanderer goes into a circular orbit 2.20×10^4 km above the surface of mongo, how many hours will it take the ship to complete one orbit? (c) an unmanned spacecraft is in a circular orbit around the moon, observing the lunar surface from an altitude of 44.0 km . to the dismay of scientists on earth, an electrical fault causes an on-board thruster to fire, decreasing the speed of the spacecraft by 23.0 m/s . if nothing is done to correct its orbit, with what speed (in km/h) will the spacecraft crash into the lunar surface?