QPA 3 Q3

Front

What is work in physics?

Back

Work is done when a force causes an object to move in the direction of the force. It is calculated as the product of the force and the distance moved in that direction.

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion. It is calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or state. For example, gravitational potential energy depends on an object's height above the ground.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the potential energy held by an object because of its height in a gravitational field. It is calculated as PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

What is the difference between kinetic energy and potential energy?

Back

Kinetic energy is energy of motion, while potential energy is stored energy based on an object's position or state.

Front

What are cilia?

Back

Cilia are small, hair-like structures on the surface of some cells that help in movement and sensing the environment.

Front

What are flagella?

Back

Flagella are long, whip-like structures that enable certain cells, such as sperm, to swim and move.

Front

How do cilia and flagella differ?

Back

Cilia are shorter and more numerous than flagella, and they move in a coordinated back-and-forth motion, while flagella typically move in a wave-like motion.

Front

What is mechanical energy?

Back

Mechanical energy is the sum of kinetic and potential energy in an object that is used to do work.

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of particles in a substance, related to its temperature.