Page 619 - SUBSEC October 2017_Neat

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Item 6 refers to the following diagram, which shows a projectile fired with a horizontal
velocity, v, from the edge of a cliff. The height of the cliff is 6 metres.

6. Which of the following pairs of values of v and h give the maximum value of Θ?

v/m s h/m
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(A) 50 10
(B) 30 50
(C) 30 30
(D) 10 50

7. A monkey of mass 20 kg rides on a 40 8. The velocity of a body with kinetic
kg trolley moving with a steady speed energy E and mass m, is
k
of 8 ms along a flat surface. The
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monkey jumps vertically to grab the (A)
overhanging branch of a tree. At what
speed will the trolley move off?

(B)
(A) 12 ms -1
(B) 8 ms -1
(C) 5 ms -1
(D) 0.33 ms (C)
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(D)

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