The position of a particle is given by x 35 cos t where x

Question

Solve the all parts of given problem:

Problem: The position of a particle is given by x = 3.5 cos ?t, where x is in meters and t is in seconds.

Part A: Find the maximum speed and maximum acceleration of the particle.

........... m/s

............ m/s²

Part B: Find the speed and acceleration of the particle when x = 1.6 m.

.......... m/s

.......... m/s²

Any help I can get on this problem is greatly appreciated! I'm not too familiar with this problem.