Page 12 - TRIAL 2

A. 100 %
B. 65.5 %
C. 80 %

D. 49.05 %

Structured Questions
4. A tool box has a mass of 2kg. The tool box is
1. A woman whose mass is 70 kg runs up a flight of lifted from the garage floor and placed on a
stairs which is 20 m above the pathway level. shelf. If the toolbox gains 145J of potential
Calculate: energy, how high is the shelf?

a) The work done by the woman

b) Potential energy possessed by the woman
5. Abu releases a 5 kg metal ball from a window at
a construction building 35 m high (take

-2
acceleration due to gravity as 9.81ms ) Find

a) What is the principle can used in this
question?

3. A pole-vaulter of mass 50 kg clears the bar at
5.0 m. What is his potential energy at the
b) The potential energy of the metal ball at
highest point?
the height of 35m.

3. The largest sea turtle found in Terengganu had

a mass of 500kg. If the gravitational potential
energy associated with the turtle as it was

being lifted onto a ship was 2 . 2  10 4 J , how
high above the water was the turtle? c) The kinetic energy of the metal ball before
it hits the ground.

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