Newton's Laws Of Motion Worksheet Answers Pdf
Introduction
Isaac Newton is one of the most renowned scientists in the world who made significant contributions to the scientific world. He is credited with laying the foundation of modern physics and calculus. His laws of motion are fundamental to understanding how objects move in the physical world. Understanding these laws requires a lot of practice and application. This article will provide you with answers to Newton's laws of motion worksheet that will help you gain a better understanding of these laws.
Newton's Laws of Motion
Newton's laws of motion describe how the physical world works. They are a set of three laws that explain how objects interact with each other. Understanding these laws is essential in analyzing the behavior of objects in the world around us. The laws are as follows:
Newton's First Law of Motion
Newton's first law of motion, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will continue in motion in a straight line and at a constant speed, unless acted upon by an external force.
For example, a ball sitting on a table will remain stationary until someone picks it up or knocks it off the table. Another example is that a car moving at a constant speed on a straight road will continue to move at that speed unless acted upon by an external force such as friction, air resistance, or a collision with another object.
Newton's Second Law of Motion
Newton's second law of motion states that the acceleration of an object is directly proportional to the net force applied to the object and inversely proportional to its mass.
This means that if you apply a force to an object, the object's acceleration will increase if its mass is small, and decrease if its mass is large. For example, pushing a small car requires less force than pushing a big truck. This is because the truck has more mass than the car.
Newton's Third Law of Motion
Newton's third law of motion states that for every action, there is an equal and opposite reaction. This means that when an object exerts a force on another object, the second object exerts an equal and opposite force on the first object.
For example, when you push against a wall, the wall pushes back on you with the same force. This is why you feel your hand is pushing against something when you touch a surface.
Answers to Newton's Laws of Motion Worksheet
Now that we understand the three laws of motion, let's look at how we can apply them to answer some questions.
Question 1
An object with a mass of 5kg is pushed with a force of 10N. What is the acceleration of the object?
Answer: Using Newton's second law of motion, we can calculate the acceleration of the object as follows:
Acceleration = net force / mass
Acceleration = 10N / 5kg = 2 m/s²
Question 2
What force is required to move a car with a mass of 1000kg at a constant speed of 20m/s?
Answer: Since the car is moving at a constant speed, we know that the net force acting on the car is zero. Therefore, the force required to move the car at a constant speed is equal and opposite to the force of friction acting on the car. We can calculate the force of friction as follows:
Force of friction = mass x acceleration
Force of friction = 1000kg x 0 = 0N
Therefore, the force required to move the car at a constant speed is zero. However, if the car was accelerating, we would need to use Newton's second law of motion to calculate the force required.
Question 3
A rocket with a mass of 5000kg is launched into space with an acceleration of 50m/s². What force is required to achieve this acceleration?
Answer: We can use Newton's second law of motion to calculate the force required to achieve this acceleration as follows:
Force = mass x acceleration
Force = 5000kg x 50m/s² = 250000N
Conclusion
Newton's laws of motion are fundamental to understanding how objects move in the physical world. They describe how objects interact with each other and how forces affect their motion. By answering the questions in this worksheet, you should have gained a better understanding of these laws and how to apply them to real-world scenarios. Remember that practice makes perfect, so keep practicing and applying these laws to different situations to master them.
