At time t=0, a 2150-kg rocket in outer space fires an engine that exerts an increasing force on it in the +x-direction. This force obeys the equation Fx = At2, where t is time, and has a magnitude of 781.25 N when t = 1.25 s. a) Find the SI value of the constant A, including its units. b) What impulse does the engine exert on the rocket during the 1.50 s interval starting 2.00 s after the engine is fired? c) By how much does the rockets velocity change during this interval?

(a) A = 499.84N/s²

(b) Impulse = 771Ns

(c) Δv = 0.359m/s

Explanation:

Please see attachment below.

To find the impulse in part (b) we integrate the the function for force with respect to time since it is time dependent between the given time intervals.

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

a displacement distance is size of displ