# Worksheet: Finding Momentum Using Vectors

In this worksheet, we will practice calculating the momentum of a particle of mass m moving in a straight line with velocity v by using vectors.

**Q2: **

A body of variable mass is moving along a fixed straight line. Its mass at time is given by the relation and its displacement is given by the relation , where is a unit vector parallel to the direction of its motion. Determine the body’s momentum and the force that is acting on it .

- A ,
- B ,
- C ,
- D ,

**Q3: **

Determine the mass of a body whose momentum is 37 kg⋅m/s, given that its displacement vector is given by the relation , where is measured in metres and in seconds.