All Flashcards
Label the forces in a free-body diagram of a box on a horizontal surface being pushed to the right with friction.
1: Weight (downward), 2: Normal Force (upward), 3: Applied Force (right), 4: Friction (left)
Label the forces in a free-body diagram of an object suspended from a rope.
1: Weight (downward), 2: Tension (upward)
Label the forces in a free-body diagram of a block sliding down an inclined plane with friction.
1: Weight (downward), 2: Normal Force (perpendicular to the incline), 3: Friction (up the incline)
Label the forces in a free-body diagram of a box at rest on an inclined plane.
1: Weight (downward), 2: Normal Force (perpendicular to the incline), 3: Static Friction (up the incline)
Label the forces in a free-body diagram of a projectile in motion (ignoring air resistance).
1: Weight (downward)
According to Newton's Second Law, what is the effect of applying a net force on an object?
The object accelerates in the direction of the net force. The acceleration is directly proportional to the net force and inversely proportional to the mass ().
What is the effect of the Earth pulling on you?
You pull on the Earth (equal and opposite force).
What are the differences between contact forces and field forces?
Contact Forces: Require physical contact (e.g., friction, normal force) | Field Forces: Act at a distance (e.g., gravity)
What are the key differences between static and kinetic friction?
Static Friction: Opposes the start of motion; can vary up to a maximum value. | Kinetic Friction: Opposes motion once it has started; constant value.
Compare and contrast the Normal Force and Weight.
Normal Force: Perpendicular to the surface, reaction force to an object pressing on a surface. | Weight: Force of gravity, always directed downwards.
Differentiate between action and reaction forces according to Newton's Third Law.
Action Force: Force exerted by object A on object B. | Reaction Force: Force exerted by object B on object A; equal in magnitude and opposite in direction to the action force.
What is the difference between mass and weight?
Mass: A measure of the amount of matter in an object (scalar). | Weight: The force of gravity acting on an object (vector), .