Basic Physics

Menu

Linear momentum – problems and solutions

1. An object travels at a constant 10 m/s. Calculate the linear momentum of the object.

Known :

Mass (m) = 1 kg

Velocity (v) = 10 m/s

Wanted : linear momentum (p)

Solution :

Formula of the linear momentum :

p = m v

p = linear momentum, m = mass, v = velocity

The linear momentum :

p = m v = (1)(10) = 10 kg m/s2

Read :  Inelastic collisions in one dimension – problems and solutions

2. A 2-kg block and a 4-kg blocks moves at a constant 20 m/s. What is the linear momentum of the blocks.

Known :

Mass of block A (mA) = 2 kg

Mass of block B (mB) = 4 kg

Velocity of block A (vA) = 20 m/s

Velocity of block B (vB) = 20 m/s

Wanted : Linear momentum of block A (pA) and linear momentum of block B (pB)

Solution :

Linear momentum of block A :

pA = mA vA = (2)(20) = 40 kg m/s

Linear momentum of block B :

pB = mB vB = (4)(20) = 80 kg m/s

Read :  Derived quantities and units – problems and solutions

3. A 2-kg block moves at a constant 2 m/s and a 2-kg block moves at a constant 4 m/s. Determine the linear momentum of the blocks.

Known :

Mass of block A (mA) = 2 kg

Mass of block B (mB) = 2 kg

Velocity of block A (vA) = 2 m/s

Velocity of block B (vB) = 4 m/s

Wanted : the linear momentum of blocks

Solution :

Linear momentum of block A :

pA = mA vA = (2)(2) = 4 kg m/s

Linear momentum of block B :

pB = mB vB = (2)(4) = 8 kg m/s

Read :  Electric circuits with resistors in parallel and internal resistance – problems and solutions

4. A 5-kg object at rest. What is the linear momentum of the momentum.

Known :

Mass (m) = 5 kg

Object’s velocity (v) = 0

Wanted : the linear momentum (p)

Solution :

p = m v = (5)(0) = 0

[wpdm_package id=’1155′]

  1. Linear momentum problems and solutions
  2. Momentum and impulse problems and solutions
  3. Perfectly elastic collisions in one dimension problems and solutions
  4. Perfectly inelastic collisions in one dimension problems and solutions
  5. Inelastic collisions in one dimension problems and solutions

Leave a Reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.