Question

What is the power of an airplane of mass 3 000 kg if when on the runway it is
capable of reaching a speed of 80 ms 1 from rest in 4.0 s?​

Answer 1

Answer:

What is the power of an airplane of mass 3000kg if when on runway it is capable of reaching speed of 80 m per second from rest in time 4 seconds? Answer. 2.4 × 1 0 6 W 2.4\times 10^6W 2.

Answer 2

4.8MW

Explanation:

Look 1st we will find acceleration cz F=ma

a=(vf-vi)÷t

so 80-0=80÷4s=20ms-1

Now

F=3000kg×20=60 ×10^3 N

As we know that

P=W/t=Fd/t=FV

So by putting values we get

P=60×10^3N ×80m/s=4800 ×10^3 W/s=4.8MW