Aperiment be determine the facel length of a
Conver lens by the displacement method​

Will you chech and finish these for me, because i am stumped with them.

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s. a. determine jay’s mass. b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k