Chapter 7 Motion

What is the difference between speed and velocity?

• Speed is scalar, velocity is vector.

• Speed and velocity are interchangeable terms.

• Speed is a measure of distance, velocity is a measure of time.

• Speed is a vector, velocity is scalar.

Define acceleration and provide an example.

• Acceleration is the rate of change of velocity with respect to time. For example, when a car speeds up from 0 to 60 mph in 10 seconds, the acceleration is 6 mph/s.

• Acceleration is the rate of change of time with respect to velocity.

• Acceleration is the rate of change of distance with respect to speed.

• Acceleration is the rate of change of speed with respect to distance.

Explain the concept of inertia.

• Inertia is the property of an object to change its state of motion instantly.

• Inertia is the force that causes objects to slow down.

• Inertia is the resistance of an object to changes in its state of motion.

• Inertia is the ability of an object to move freely without any resistance.

What is the formula to calculate speed?

• Speed = Distance x Time

• Speed = Time / Distance

• Speed = Distance / Time

• Speed = Distance + Time

How does friction affect motion?

• Friction causes objects to move without any resistance

• Friction opposes motion by creating resistance between surfaces in contact.

• Friction accelerates motion by reducing resistance between surfaces

• Friction has no impact on motion

Describe the three laws of motion proposed by Isaac Newton.

• Law of Gravitation: Objects are attracted to each other with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.

• Law of Thermodynamics: Energy cannot be created or destroyed, only transformed from one form to another.

• Law of Reflection: The angle of incidence is equal to the angle of reflection.

• 1. Law of Inertia: A body at rest will remain at rest, and a body in motion will remain in motion at a constant velocity unless acted upon by an external force. 2. Law of Acceleration: The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. F = ma. 3. Action-Reaction Law: For every action, there is an equal and opposite reaction.

What is the difference between static and kinetic friction?

• The difference between static and kinetic friction is that static friction occurs when two surfaces are not moving relative to each other, while kinetic friction occurs when two surfaces are sliding past each other.

• Static friction only occurs on rough surfaces, while kinetic friction only occurs on smooth surfaces.

• Static friction is stronger than kinetic friction.

• Static friction occurs when two surfaces are moving relative to each other, while kinetic friction occurs when two surfaces are not moving.

How does air resistance impact the motion of objects?

• Air resistance slows down the motion of objects by creating a force opposite to the direction of motion.

• Air resistance causes objects to move in a circular path.

• Air resistance has no impact on the motion of objects.

• Air resistance speeds up the motion of objects by pushing them forward.

Discuss the concept of momentum.

• Momentum is only relevant in stationary objects.

• Momentum is the product of an object's mass and velocity.

• Momentum is not affected by an object's mass.

• Momentum is the result of an object's weight and acceleration.

Explain the relationship between force, mass, and acceleration.

• F = ma

• F = mx

• F = ma^2

• F = am