Find the net force on the helicopter at t 50s express your

Question

Question: The position of a 2.75 x 10⁵N training helicopter under test is given by r? = (0.020 m/s3) t3i^ + (2.2m/s)tj^ ?(0.060m/s2)t2k^.

Part A: Find the net force on the helicopter at t = 5.0s. Express your answer in terms of i^, j^, k^. Express your coefficient using two significant figures.