Question

GCE O (c) In the first four minutes after take-off, the acceleration of the rocket is uniform. (1) State what is meant by a uniform acceleration, [ [2 ] (ii) Fig. 9.3 describes the motion of the rocket in the first 12 minutes. time/minutes motion of the rocket O to 4 uniform acceleration 4 to 6 t of 400 000N. increasing acceleration decreasing acceleration 6 to 10 10 to 12 constant speed Fig. 9.3 rban Sami On Fig. 9.4, sketch the speed-time graph of the Tocket for the first 12 minutes. You do not need to give values for the speedy speed Compiled By 0 N- 4 6 8 10 12 time after take-off/min MH PHOTO COPY (F-10-PWD-Bahr Fig. 9.4 [3] (iii) State how the speed-time graph in (ii) can be used to find the distance travelled by the rocket​

Answer 1

Explanation:

For 1 minute, distance, d travelled is:

d=ht0+21at2=21×10×(60)2=236000=18000 mt

v=u+at=10×60=600 m/s

Now, for max m height:

v12=412−2gs(v1=v)

⇒s=2g(600)2=2×10600×600=18000 mt

⇒ Total attitude =d+s=18000+18000

=36000 m

=36 Km