Real-life examples of Newton's Second Law

📚 Quick Study Guide

🔍 Newton's Second Law states that the acceleration of an object is directly proportional to the net force acting on the object, is in the same direction as the net force, and is inversely proportional to the mass of the object.

💡 The formula for Newton's Second Law is: $F = ma$, where:
• $F$ = Net Force (in Newtons)
• $m$ = Mass (in kilograms)
• $a$ = Acceleration (in meters per second squared)

📝 In simpler terms, the greater the force applied to an object, the greater its acceleration. Also, the more massive an object is, the less it will accelerate for a given force.

Practice Quiz

1. A 2 kg bowling ball accelerates at 5 m/s². What is the net force acting on the bowling ball?
   1. 2.5 N
   2. 7 N
   3. 10 N
   4. 20 N
2. Which of the following scenarios best demonstrates Newton's Second Law?
   1. A car moving at a constant speed on a straight road.
   2. A book resting on a table.
   3. A rocket accelerating upwards during launch.
   4. A ball bouncing off a wall.
3. A 10 kg box is pushed with a force of 50 N. Ignoring friction, what is the acceleration of the box?
   1. 0.2 m/s²
   2. 5 m/s²
   3. 500 m/s²
   4. 60 m/s²
4. Two boxes, one with a mass of 5 kg and another with a mass of 10 kg, are pushed with the same force. Which box will have a greater acceleration?
   1. The 5 kg box.
   2. The 10 kg box.
   3. They will have the same acceleration.
   4. It depends on the color of the boxes.
5. If the net force acting on an object is doubled, what happens to its acceleration, assuming the mass remains constant?
   1. It remains the same.
   2. It is halved.
   3. It is doubled.
   4. It is quadrupled.
6. A car with a mass of 1500 kg accelerates from 0 to 20 m/s in 10 seconds. What is the net force acting on the car?
   1. 1500 N
   2. 3000 N
   3. 30000 N
   4. 150 N
7. A baseball (mass = 0.145 kg) is hit with a force of 1000 N. What is the baseball's acceleration immediately after being hit?
   1. 14.5 m/s²
   2. 6897 m/s²
   3. 1000 m/s²
   4. 0.145 m/s²