A particle moves in a straight line with velocity v ms^-1. Its initial velocity is u ms^-1. At any time t, the velocity v is given by the equation (dv/dt) + 3 + v^2=2. Prove that the particle comes instantaneously to rest after tan^-1 seconds. Given that the particle moves s metres in t seconds, show that the particle first comes to rest after a displacement of 1/2 ln (1+u^2) metres.

any one of the statements could be an accurate comparison. but the statement that would define the correct choice and seal the deal is not even on the list:

"the visibilities of vector-x and vector-y in the drawing provided with the question are identical and nonexistent."

8 meters above the spring

connect the batteries in series and hope

there are no contact forces mentioned on the list of choices that you've provided.