Page 51 - SP015 Past Years PSPM Chapter 1 -5 Ver.2020

PSPM SP015

PSPM 2013/2014 SF016/2 No. 3(c)

27.
18 m

12 m

FIGURE 5.13

FIGURE 5.13 shows a block held at rest at the top of a 18 m long rough slope with
coefficient of kinetic friction 0.19. The height of the box on the slope is 12 m. When
released, the block slides down.

(a) Calculate the final speed of the block at the bottom of the slope. [5 m]

(b) If the mass of the block is increased, will the final speed of the block decrease,
same or increase? Justify your answer. [2 m]

UPS 2014/2015 SF016 No. 4(b)(ii)

28.

u

4 m

3 m

FIGURE 5.14

FIGURE 5.15 shows a particle moving down a curved track with speed u at height
3 m. Upon leaving the track, the particle travels straight up and reaches a maximum
height 4 m. Ignoring friction and air resistance, determine the speed u. [4 m]

UPS 2015/2016 SF016 No. 4(b)(i)

-1
29. A 0.8 kg ball is kicked with speed 20 m s at an angle of 50 to the horizontal.
Calculate the kinetic energy of the ball at maximum height. [4 m]

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