You could definetely say in the question that since the accelerations + velocity didn't math, much of the extra force being exerted were largely from the initial boosting stages + orbit around sun/earth.
That projectile motion question was super easy that should've been q21 IMO
The other one was abt EM induction and it was straightforward, just dump faraday + lenz law -> EM braking
35 was pre straightforward?
Can't really think of a problem which was difficult in the paper but moreso just annoying/wierd. The mark distribution felt really wierd as well
For the rocket question where we had to find the mass of a planet using conservation of energy, do we equate the change in kinetic energy with the change in gravitational potential energy? so 1/2mv^2 = GMm/r
For the rocket question where we had to find the mass of a planet using conservation of energy, do we equate the change in kinetic energy with the change in gravitational potential energy? so 1/2mv^2 = GMm/r