Answer:
After 1.5 s speed = 20.625 m/s
After 3 s speed = 41.25 m/s
Step-by-step explanation:
1 Newton = 1 kg · m/s²
5500 N = 5500 kg · m/s² and this is the thrust (force) exerted on the jet
The impulse for 1.5 seconds is F x t
The change in momentum is m Δv where v is the change in velocity = v - u where v = final velocity and u = initial velocity
Since the dragster starts from res, u = 0 and Δv is simply v
Impulse = Momentum change
After 1.5 s for a thrust of 5500 N and a mass of 400 kg
5500 x 1.5 = 400 x v
v = 5500 x 1.5/400 = 20.625 m/s
After 3 seconds,
v = 5500 x 3/400 = 41.25 m/s