Newton's 2nd Law
In the equation F = ma, what does 'F' represent?
Force
What force is always present in a free body diagram of an object on Earth?
Gravity
In a free body diagram of an elevator moving upward, which force is larger?
Upwards Force, Downwards Force, They are the same, It depends on the elevator's speed
Upwards Force
What force is required to accelerate an 8 kg object at 3 m/s2?
24 Newtons
What happens to the net force if an object's acceleration becomes zero?
It becomes zero.
In a free body diagram of a car accelerating forward, which force points backward?
Friction
What is the net force on an object that is not accelerating?
Zero
If a 10 N force causes an acceleration of 2 m/s², what is the mass of the object?
5 kg
What does Newton's Second Law state?
Force equals mass times acceleration.
In a free body diagram of a book on a table, which force counteracts gravity?
Normal Force
If mass increases but force stays constant, what happens to acceleration?
Acceleration decreases
If a 5 kg object experiences a net force of 10 N, what is its acceleration?
2 m/s2
In F = ma, if 'F' is measured in Newtons and 'm' in kilograms, what are the units of 'a'?
Meters per second squared, m/s2
What is a free body diagram used to show?
All forces acting on a body
What happens to acceleration if force is doubled but mass remains constant?
Acceleration doubles
If a 2 kg object accelerates at 3 m/s², what is the net force acting on it?
6 Newtons
What type of force is not typically shown in a free body diagram of an object in free fall?
Friction, Air Resistance, Gravity, Normal Force
Normal Force
Which of these is NOT shown in a free body diagram?
Velocity, Gravity, Friction, Normal Force
Velocity
What does the length of an arrow in a free body diagram represent?
Magnitude or amount of force
If a 800,000 kg train is braking with a force of 35,000 N, what acceleration does it experience?
.044 m/s2