Hello everyone,

I am currently stuck on the following question for exam revision and need help, could someone please go step by step so I understand this.

The displacement ’y’ mm of a slide value of an engine is given by the expression

y =t2 ln 4t

3sint

a) Find the expression for velocity of the valve

b) Evaluate the velocity in ms-1 when t =20 x 10-3 seconds

Thank you Phill