How do you find the change in velocity

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?

What is the momentum of a 2 kg object moving at 15 meters per second

The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.