Answer Happy

If the rocket sled shown in the figure below starts with onlyone rocket burning, what is the magnitude of its acceleration (inm/s2)? Assume that the mass of the systemis 2120 kg, thethrust T is 1.4 ✕ 104 N,and the force of friction opposing the motion is known tobe 765 N.
m/s2
(b)
Why is the acceleration not one fourth of what it is with allrockets burning? (The acceleration when all four rockets areburning is 26 m/s2. The force of frictionremains 765 N.)
(a) If the rocket sled shown in the figure below starts with only one rocket burning, what is the magnitude of its acceleration (in m/s²)? Assume that the mass of the system is 2120 kg, the thrust T is 1.4 x 104 N, and the force of friction opposing the motion is known to be 765 N. m/s² (b) Why is the acceleration not one fourth of what it is with all rockets burning? (The acceleration when all four rockets are burning is 26 m/s². The force of friction remains 765 N.)