cameroon gce A level 2024 mechanical design 1
cameroon gce A level 2024 mechanical design 1
13. A ladder slides on the wall as shown in figure 7
below. The nature of motion of the ladder is
4) Initial position’
i TTl Figure: 7
A plane motion
B rotation motion
C translation motion
:
Ii 1 i 1 s l g • 5
;s ; V >k 4. ? D sliding motion
4 4.;— 3. .4,. V‘ i .
i ; \ f n
14. From the knowledge of plane kinematics, the methods
named below help in graphical determination of the
velocity of a point belonging to a movable part except
3 i 4 1 v –iy–.–r ‘V *A equiprojectivity
B Instantaneous centre of rotation(ICR)
C triangle of velocities
D funicular
0 t 2 3 4 5 6 7 Z
T 7 T –F T
3 »t(S)
Figure: 6
It’s velocity at 5s is
A 2m/s
B 3m/s
C 4m/s
D 5m/s
15. Force F accelerates lKg mass with an acceleration a.
If the same force is applied to 5Kg mass, then the
acceleration of this mass will be
A 5a
B 25a
C a/5
D a/25
10. An engine shaft rotates at 1800rev/min. the
magnitude of the angular velocity of the indicated
shaft during this rotation is
A 6x 7t rad/s
B 60x n rad/s
C 18 X 7T rad/s
D 30x n rad/s
16. A nurse is using ION horizontal force to push a
hospital bed at 400mm.s’1 on a smooth horizontal
floor for about 10 seconds. The energy developed by
the nurse is:
A 40J
B 400J
C 4000J
D 40000J
11. In a uniformly accelerated rotational motion of a car
engine moving from rest, the equation relating the
angular velocity co , the angular acceleration wand the
displacement A0 covered is
A co2 —2o) A6
co 2 = or Ad
C co =2u) A6
D to = wA0
17. Calculate the power developed by a builder to raise
from the ground to the third floor of a story building a
50 kg bag of cement in 20 seconds with an estimated
work of 10000J.
A 1000W
B 100W
C 40W
D 500W
B
12. The following methods are used to solve statics
problems except method.
A Cullman’s
18. The kinetic energy of a ball of 100 g mass whose
velocity is 36 km/h is:
A 5J
B 5xl03J
C 50J
D 0.5J
