Exploring Laws of Motion and Work

What does Newton's First Law state about motion?

• An object will remain at rest or in uniform motion unless acted upon by a net external force.

• An object will accelerate if no forces are acting on it.

• An object will change its direction only if a force is applied.

• An object in motion will eventually come to a stop without any force.

How does Newton's Second Law relate force, mass, and acceleration?

• Acceleration is equal to force divided by mass (a = F / m).

• Force is equal to mass times acceleration (F = m * a).

• Force is equal to acceleration divided by mass (F = a / m).

• Mass is equal to force times acceleration (m = F * a).

What is an example of Newton's Third Law in action?

• Jumping off a boat pushes the boat backward.

• Sitting still on a chair causes the chair to move.

• Throwing a ball straight up causes it to fall down without any reaction.

• A car accelerating forward pushes the driver backward.

What are the two main types of forces?

• Centrifugal forces and centripetal forces

• Contact forces and non-contact forces

• Frictional forces and gravitational forces

• Magnetic forces and electrical forces

Define gravitational force and give an example.

• An example of gravitational force is the attraction between the Earth and an apple, which causes the apple to fall to the ground.

• The force that makes a car accelerate when the engine is turned on.

• The force that causes a ball to roll on a flat surface.

• The force that pushes objects away from each other, like magnets.

What is the formula for calculating work done?

• Work = Distance / Time

• Work = Force / Distance

• Work = Force x Distance x cos(θ)

• Work = Force + Distance

How is work related to energy in physics?

• Work is the transfer of energy through force applied over a distance.

• Work is only related to motion, not energy.

• Energy can be created through work.

• Work is the same as energy.

What is inertia according to Newton's First Law?

• Inertia is the gravitational pull on an object.

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

• Inertia is the mass of an object multiplied by its velocity.

• Inertia is the force that causes an object to move faster.

Explain the concept of net force.

• Net force is the force applied by a single object only.

• Net force is the average of all forces acting on an object.

• Net force is the force that opposes motion only.

• Net force is the total force resulting from the combination of all individual forces acting on an object.

What happens to an object at rest according to Newton's First Law?

• An object at rest remains at rest unless acted upon by a net external force.

• An object at rest will start moving on its own.

• An object at rest will eventually fall due to gravity.

• An object at rest will change its position without any force.