Physics Concepts

What is the SI unit of force?

• Joule (J)

• Newton (N)

• Watt (W)

• Pascal (Pa)

Define Newton's First Law of Motion.

• Objects in motion will eventually come to a stop without any external force.

• An object will move in a circular path unless acted upon by an external force.

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

• An object will accelerate when no force is applied to it.

Explain the concept of work in physics.

• Work in physics is the product of force and distance, expressed as work = force x distance.

• Work is not related to distance traveled.

• Work is only dependent on the force applied.

• Work is the same as power in physics.

What is the formula to calculate acceleration?

• acceleration = (final velocity - initial velocity) / time

• acceleration = (final velocity * initial velocity) / time

• acceleration = (final velocity + initial velocity) / time

• acceleration = final velocity / time

Describe the difference between mass and weight.

• Mass is the amount of matter in an object, weight is the force exerted on an object due to gravity.

• Mass is measured in pounds, weight is measured in kilograms.

• Mass is the force exerted on an object, weight is the amount of matter in an object.

• Mass is a vector quantity, weight is a scalar quantity.

What is the law of conservation of energy?

• Energy can be created out of nothing

• Energy cannot be created or destroyed, only transferred or transformed.

• Energy can be destroyed completely

• Energy can be transformed into matter

How does a concave lens differ from a convex lens?

• A concave lens causes light rays to converge, while a convex lens causes light rays to diverge.

• A concave lens is used to correct farsightedness, while a convex lens is used to correct nearsightedness.

• A concave lens causes light rays to diverge, while a convex lens causes light rays to converge.

• A concave lens is thicker in the middle and thinner at the edges, while a convex lens is thinner in the middle and thicker at the edges.

Define electric current and its unit of measurement.

• Electric current is the flow of electric charge. It is measured in Amperes (A).

• Electric current is the flow of water. It is measured in Liters (L).

• Electric current is the flow of air. It is measured in Cubic meters (m^3).

• Electric current is the flow of heat. It is measured in Joules (J).

Explain the concept of electromagnetic induction.

• Electromagnetic induction is the process where a changing magnetic field induces an electromotive force (EMF) in a conductor, leading to the generation of an electric current.

• Electromagnetic induction involves the conversion of sound waves into electrical energy

• Electromagnetic induction is the process of generating heat through friction

• Electromagnetic induction is the phenomenon where light is refracted by a magnetic field

What is the relationship between frequency and wavelength in physics?

• Direct

• Inverse

• Proportional

• Constant