1. Mechanics
Momentum — Quiz
Test your understanding of momentum with 5 practice questions.
Practice Questions
Question 1
A system consists of two particles with masses $ m_1 $ and $ m_2 $, and velocities $ \vec{v}_1 $ and $ \vec{v}_2 $, respectively. If the total external force acting on the system is zero, which of the following statements is true regarding the total linear momentum of the system?
Question 2
A $ 2.0 \text{ kg} $ object moving at $ 6.0 \text{ m/s} $ collides head-on with a $ 4.0 \text{ kg} $ object moving in the opposite direction at $ 3.0 \text{ m/s} $. If the collision is perfectly elastic, what is the velocity of the $ 2.0 \text{ kg} $ object after the collision?
Question 3
A billiard ball of mass $ m $ moving with velocity $ v $ strikes an identical billiard ball at rest. If the collision is perfectly elastic and head-on, what is the velocity of the first ball after the collision?
Question 4
A $ 0.05 \text{ kg} $ tennis ball approaches a racket with a speed of $ 30 \text{ m/s} $. It is hit back with a speed of $ 40 \text{ m/s} $ in the opposite direction. What is the magnitude of the impulse delivered to the ball by the racket?
Question 5
A $ 2.0 \text{ kg} $ block is initially at rest on a frictionless horizontal surface. A bullet of mass $ 0.02 \text{ kg} $ is fired horizontally into the block and becomes embedded in it. If the block with the embedded bullet moves with a speed of $ 0.5 \text{ m/s} $ immediately after impact, what was the initial speed of the bullet?