Day 7, Unit 2 Newton's 2nd Law

Match

Do Now: Match the following quantity with their corresponding unit:

• Speed or velocity (v)

• Force (F)

• mass (m)

• Acceleration (a)

• distance or displacement (d)

m/s

Newton (N)

kg

m/s²

m

• m/s

• Newton (N)

• kg

• m/s²

• m

Newton's Second Law of Motion

Force (unit): The quantity that causes an object to accelerate. It is measured in Newtons (N).
Acceleration (unit): The rate at which an object changes its velocity. It is measured in meters per second squared (m/s^2).
Velocity (unit): The speed of an object in a given direction. It is measured in meters per second (m/s).
Distance (unit): The total length traveled by an object. It is measured in meters (m).

Newton's Second Law of Motion

The acceleration of an object is directly proportional to the magnitude of the net force, in the same direction as the net force. The net force equals mass times acceleration. Acceleration can change an object's speed, direction, or both. Formula: F = ma (force = mass x acceleration).

Multiple Choice

According to Newton's Second Law of Motion, what is the relationship between acceleration and the magnitude of the net force?

• Acceleration is inversely proportional to the magnitude of the net force.

• Acceleration is directly proportional to the magnitude of the net force.

• Acceleration is unrelated to the magnitude of the net force.

• Acceleration is equal to the magnitude of the net force.

Newton's Second Law: Net Force

The net force, not just any force, is related to acceleration. It is calculated by summing up all the forces acting on an object. The unit of force is the Newton (N), which can be calculated using the equation: F = m * a. To find the missing variable, rearrange the equation accordingly. Practice solving for net force, mass, and acceleration using given values.

Multiple Choice

What is the equation to calculate net force?

• F = m * a

• F = m + a

• F = m / a

• F = m - a

Net Force Equation

F = m * a is the equation used to calculate net force. Net force is the overall force acting on an object, determined by multiplying the mass (m) of the object by its acceleration (a). This equation helps us understand how forces affect the motion of objects.

Multiple Choice

What is the formula for the 2nd law of motion?

• a = lw

• F = mama

• F = ma

• F = llama

Multiple Choice

According to Newton's second law, if you increase the force applied to an object :

• it accelerates more
• it doesn't move
• you get more inertia
• it decelerates

Multiple Choice

According to Newton's second law of motion, what happens to acceleration when mass increases?

• Acceleration also increases

• Acceleration decreases

• Acceleration remains the same

• Acceleration cannot be determined

Newton's Second Law:

Acceleration decreases when mass increases. This means that the heavier an object is, the harder it is to accelerate. It's like trying to push a heavy rock compared to a light feather. Newton's second law helps us understand how mass affects motion.

Multiple Choice

Why is it harder to push a van filled with bowling balls than it is to push a van with basketballs?

• The mass of the car is greater than the mass of the basketballs

• The mass of the bowling balls is greater than the mass of the basketballs

• The van with the basketballs is bigger than the van with the bowling balls

• It should be equally as hard to push the two vans