Understanding the Law
Newton's Second Law states...
that the acceleration of an object is dependent upon two variables -- the net force acting upon the object and the mass of the object.
What is the formula for Newton's Second Law?
F = ma
(Force = mass x acceleration)
If you push a cart with a force of 20 N and it accelerates at 2 m/s², what is its mass?
m = 10kg
What is the unit of force?
Newton (N)
What is acceleration?
The rate at which an object's velocity changes over time
What two factors determine the acceleration of an object?
The force and mass of an object
A 10 kg object is being pushed with a force of 50 N. What is its acceleration?
a = 5 m/s²
Why does it take more force to move a heavy object compared to a lighter object?
Because the heavier object has more mass, requiring more force to achieve the same acceleration.
What is the unit of mass?
Kilogram (kg)
If the force acting on an object increases, but its mass stays the same, what happens to its acceleration?
The acceleration increases
If an object has more mass, how does if affect the force needed to make it accelerate?
More force is needed to accelerate an object with more mass
A 4 kg object accelerates at 3 m/s². What is the force acting on it?
F = 12N
When a rocket launches into space, why is the force applied to it so large?
Because the rocket has a large mass, so a large force is required to achieve a significant acceleration.
What is the unit of acceleration?
Meters per second squared (m/s²)
A spaceship with a mass of 5000 kg is experiencing a force of 10,000 N. What is its acceleration?
a = 2 m/s²
What is the relationship between acceleration and how it depends on force and mass?
The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object.
A car with a mass of 800 kg is accelerating at 2 m/s². What is the force applied?
F = 1600N
If two cars collide and one is heavier, which car will experience a greater acceleration?
The lighter car will experience a greater acceleration because the same force is applied to both, but the lighter car has less mass.
If a 2 kg object accelerates at 5 m/s², what is the force in Newtons?
F = 10N
Who is known for formulating the three laws of motion?
Sir Isaac Newton
What happens to the acceleration of an object if the force applied is doubled while the mass stays the same?
The acceleration is doubled
If an object with a mass of 20 kg is accelerating at 4 m/s², what is the net force on it?
F = 80N
If an adult and a child pushes against each other with an equal amount of force, who would accelerate more?
The child, it has less mass
What specific force is acceleration directly dependent on?
Net Force (Fnet)
How is a Newton defined in terms of other units?
1 Newton (N) is equal to 1 kg·m/s²