Page 15 - TRIAL 2

ii. When the squirrel falls 1.5 meter from the
tree
iv. Velocity of the coconut just before it

touches the ground.

iii. When the squirrel touches the ground.

20. A motor is used to pump water from a river with
a depth of 5 m at a rate of 30N per minute.
Calculate the power of the pump.

(Final Exam Session Dec 15)
17. A durian falls from a height of 6.5 m. What is the
velocity of the durian just before it strikes the
ground?

18. Cik Aliya with a mass of 50 kg is climbing up to
the top of 20 m stairs within 1 minute. Calculate the
work done and power produced by Cik Aliya to
climb up the stairs.
(Final Exam Session Dec 15) ANSWER

Multiple Choice

1.C 2.C 3.D 4.B 5.B 6.B

7.C 8.A 9.C 10.B 11.A 12.D

19. A coconut with a mass of 1 kg falls from a tree
which is 15 m high from the ground. Calculate : Structured Questions
(Final Exam Session Dec 15)
1. a) 13734J
b) Work done= energy needed=13734J
i. Potential energy while the coconut is still
on the tree. 2. 2452.5J

3. 4.4852m

4. 7.3904m
5. b) 1716.75J

ii. Potential energy and kinetic energy when
6. a) 30W
the coconut falls 10 m from the tree.

b) 58.86%
29
7. 4.8062×10 J

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