Question

Name Miva Valeatine FORMULA SHEE PROVIDED FEEL FREE TO WRITE YOUR DIFFERENT ANSWER İF YOU FEEL YOURS IS THE RIGHT ONE A rocket initially at rest (V,-o), is fired with a constant acceleration a 18.0 m/s The rocket travels vertically upward for 17.0 s at which time at which time all the fuel is burned, making it a freely falling object. Calculate the maximum height reached by the rocket before falling back to the ground 1) nswer 7378 m 44 6536 m 5004 m 4315 m speed of 30 m/s for 15s. He then accelerates at 3 m/s2 for 4 s He drives at this top speed for 21s and then takes another 18 s to 2) A motorist travels with a constant desired top speed. bring the car to a stop. Calculate the average speed for the entire period. 37.1 m/s 33.7 m/s 38.3 m/s A rockeck of mass 4.36 x 10 kg is in flight near the eartj's surfac 50° abve the horizontal and has a magnitude of 9.90 x 10 N. Calculate the magnide of th e. Its thrust T is direct ed at an angle eration nswex 13 mis 14.6 m/s m/s m/s tal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 880 m/s. The gun is tly at the center of the bull's eye, but strikies the target o.055 m below the center. e horizontal distance between the rifle and the bull's-eye. mSuwe 69.92 m 93.23 m 46.62 81.58 m 58.27 m

Answer 1

1] maximum height reached = height reached with fuel + height in free fall

= 0.5at^2 + v^2/2g

= 0.5*18*17^2 + (18*17)^2/19.6

= 2601 + 4777

= 7378 m

option C is correct, not D