Uncategorized: Practice Problem & Solution

Solution Explained:

To solve this problem, we apply the core principles of Uncategorized. Understanding the underlying formula is key to arriving at the correct answer below:

Force is the rate of change of momentum: \(F = frac{Delta p}{Delta t} = frac{m(v-u)}{Delta t}\). Given \(m = 150text{ gm} = 0.15text{ kg}\), \(u = 20text{ m/s}\), \(v = 0text{ m/s}\), \(Delta t = 0.1text{ s}\). So, \(F = frac{0.15 times (0 - 20)}{0.1} = frac{-3}{0.1} = -30text{ N}\). The magnitude of the force is \(30text{ N}\).