1. Mechanics
Momentum — Quiz
Test your understanding of momentum with 5 practice questions.
Practice Questions
Question 1
A force varying as $F(t)=6t^2\,\mathrm{N}$ acts on a $9\,\mathrm{kg}$ object initially at rest from $t=0$ to $t=3\,\mathrm{s}$. What is the object's speed at $t=3\,\mathrm{s}$?
Question 2
A $0.500\,\mathrm{kg}$ puck slides at $8.00\,\mathrm{m/s}$ on frictionless ice and collides elastically with an identical puck initially at rest. After the collision, the first puck moves at $30^\circ$ to its original line. What are the speeds of the first and second puck, respectively?
Question 3
A $1.50\,\mathrm{kg}$ ball traveling at $10.0\,\mathrm{m/s}$ collides elastically in one dimension with a $0.50\,\mathrm{kg}$ ball at rest. What is the speed of the $1.50\,\mathrm{kg}$ ball after the collision?
Question 4
A $5.00\,\mathrm{kg}$ stationary object explodes into two fragments of masses $2.00\,\mathrm{kg}$ and $3.00\,\mathrm{kg}$. The $2.00\,\mathrm{kg}$ fragment moves east at $30.0\,\mathrm{m/s}$. What is the velocity of the $3.00\,\mathrm{kg}$ fragment?
Question 5
Two objects of masses $m$ and $3m$ collide completely inelastically in one dimension, with the mass $m$ initially moving at speed $v$ and $3m$ at rest. What fraction of the initial kinetic energy is lost?