4.2 s later. 1. A rock is thrown from a clifftop at 18 m/s, 25 above the horizontal. It lands on the beach 18 m/s - - - Q 250 h -d a) What is the height h of the cliff? (4 marks) CS Scanned with CamScannerb) How far from the base of the cliff d did the rock land? (3 marks) CS Scanned with CamScanner2 two blocks of mass d the tension force (5 marks) % r 8) Am 20 kfm '1 hozontal force of 180 N on a piece of rope causing 0 kg to accelerate. Friction on the blocks is negligible. Fin at x ' - - - 1n the rope Jommg the two blocks together. Scanned with CamScanner b) Bob exerts a force of equal magnitude in the opposite direction on an identical pair of blocks. FB = 180 N X 40 kg 20 kg Bob How does the tension force at X compare to the value in part a)? (Circle one.) (1 mark) i) The tension force is the same. ii) The tension force is greater than in a). iii) The tension force is smaller than in a). c) Using principles of physics, explain your answer to part b). (3 marks) CS Scanned with CamScanner3. A 0.25 kg cart travelling at 3.0 m/s collides with and sticks to an identical stationary cart on a level track. (Ignore friction.) v = 3.0 m/s m = 0.25 kg (7 marks) To what height h do the combined carts travel up the hill? CS Scanned with CamScanner