NLM - Newton's Second Law

Newton's Second Law

Newton's second law deals with the relationship between forces and acceleration. The law states that the acceleration of an object is directly proportional to the net external force acting on it and inversely proportional to the mass of the object. Newton's second law allows us to link forces and motion. The second law is used to determine the acceleration and that acceleration can be applied to objects using the kinematic equations. The net force on an object is the vector sum of all the forces on that object. Please watch the following presentation that will introduce Newton's Second Law of Motion.

Newton's Second Law Practice

The application of Newton's Second Law is a combination of vector addition and the kinematic equations. Please watch the following presentation of some example problems.

Newton's Second Law Self-Assessment

Now it is your turn. Complete the following Newton's Second Law problems and quiz to verify that you understand how to add and subtract vectors.

A 25kg cart sits on a horizontal frictionless surface. A force of 50N is applied at an angle of 40 degrees causing the cart to accelerate forward.

1. Draw a free body diagram for the cart. 
2. What is the weight of the cart?
3. What is the normal force acting on the cart?
4. What is the acceleration of the cart?

SOLUTIONS Links to an external site.

Newton's Second Law Practice Problems

Download Newton's Second Law Practice Problems Links to an external site.for more practice.

Download solutions Links to an external site. to the practice problems. 

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