Impulse Quiz with Answers: Test Your Understanding

📚 Quick Study Guide

• 🎯 Impulse is the change in momentum of an object.
• 🍎 Impulse is a vector quantity.
• 🧮 The formula for impulse (J) is: $J = F \Delta t = \Delta p$, where F is force and $\Delta t$ is the time interval.
• 📐 $\Delta p = m\Delta v = m(v_f - v_i)$, where $m$ is mass, $v_f$ is final velocity, and $v_i$ is initial velocity.
• 💡Impulse is measured in Newton-seconds (Ns) or kilogram-meters per second (kg m/s).

🧪 Practice Quiz

1. A 2 kg ball is traveling at 3 m/s. It's then hit with a bat, sending it in the opposite direction at 4 m/s. What is the impulse imparted by the bat?
   1. -2 kg m/s
   2. 2 kg m/s
   3. -14 kg m/s
   4. 14 kg m/s
2. A constant force of 20 N is applied to an object for 2 seconds. What is the impulse on the object?
   1. 10 Ns
   2. 40 Ns
   3. 20 Ns
   4. 0 Ns
3. Which of the following is NOT a valid unit for impulse?
   1. Ns
   2. kg m/s
   3. kg m/s²
   4. lb s
4. A 0.5 kg rock falls from a cliff. What is the magnitude of the impulse on the rock after 3 seconds? (Assume g = 9.8 m/s²)
   1. 4.9 Ns
   2. 14.7 Ns
   3. 1.63 Ns
   4. 0 Ns
5. An object's momentum changes from 20 kg m/s to 30 kg m/s. What is the impulse on the object?
   1. 50 kg m/s
   2. 10 kg m/s
   3. -10 kg m/s
   4. 600 kg m/s
6. A golf club exerts a force of 1000 N on a golf ball for 0.002 seconds. What is the impulse imparted to the golf ball?
   1. 2 Ns
   2. 500000 Ns
   3. 0.5 Ns
   4. 5 Ns
7. Two objects collide. Object A receives an impulse of +5 Ns. What is the impulse received by Object B?
   1. +5 Ns
   2. -5 Ns
   3. 0 Ns
   4. Cannot be determined