Question

during launching the space rocket accelerated uniformly from rest 200 metre per second square in 5 second and travel the constant speed for 4 second . how far rocket travel in 9 second ​

Answer 1

Answer:

1800 rocket travel in 9 second

Answer 2

Distance travelled by rocket in first 4 seconds = ut+1/2a t^2

= 0 * 4+ 1/2 *200 * 16

= 100* 16

1600 m

velocity at end of 4 seconds = 0+ 200* 4

= 800 m/s

distance travelled in next 5 seconds = 800*5

= 4000m

Therefore, total distance = 1600+4000 = 5600m or 5.6km