Physics Concepts for Grade 10

What is Newton's second law of motion?

• An object in motion will stay in motion unless acted upon by an equal force.

• The force acting on an object is equal to its mass times its velocity (F = mv).

• The acceleration of an object is constant regardless of the net force applied.

• The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F = ma).

Define kinetic energy and provide its formula.

• The formula for kinetic energy is KE = 0.5 * m * v^2, where KE is kinetic energy, m is mass, and v is velocity.

• The formula for kinetic energy is KE = m * v, where KE is kinetic energy, m is mass, and v is velocity.

• The formula for kinetic energy is KE = 0.5 * m * v, where KE is kinetic energy, m is mass, and v is acceleration.

• Kinetic energy is defined as the energy possessed by a body at rest.

Explain the concept of thermal equilibrium.

• Thermal equilibrium is the process of heating a body until it reaches a boiling point.

• Thermal equilibrium refers to the state where bodies are in motion and generate heat.

• Thermal equilibrium is the state in which two or more bodies in thermal contact have the same temperature, resulting in no net heat transfer between them.

• Thermal equilibrium occurs when bodies are at different temperatures but still transfer heat.

What is the difference between heat and temperature?

• Heat is a type of temperature.

• Heat is energy transfer; temperature is a measure of thermal energy.

• Temperature measures energy transfer.

• Heat is the same as temperature.

Describe the law of conservation of energy in thermodynamics.

• Energy can be destroyed but not created.

• Energy is always lost in transformations.

• Energy cannot be created or destroyed, only transformed.

• Energy can be created from nothing.