Front

What is the principle of conservation of mechanical energy?

Back

The principle states that in a closed system with no non-conservative forces (like friction), the total mechanical energy (potential + kinetic) remains constant.

Front

Define kinetic energy and provide its formula.

Back

Kinetic energy (KE) is the energy of an object due to its motion. The formula is KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy and how is it calculated for an object at height h?

Back

Potential energy (PE) is the energy stored in an object due to its position in a gravitational field. It is calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

Explain the concept of normal force in physics.

Back

The normal force is the force exerted by a surface to support the weight of an object resting on it, acting perpendicular to the surface.

Front

What is the work-energy theorem?

Back

The work-energy theorem states that the work done on an object is equal to the change in its kinetic energy.

Front

Define the coefficient of kinetic friction and its significance.

Back

The coefficient of kinetic friction (μk) is a dimensionless scalar that represents the frictional force between two moving surfaces. It is significant in calculating the force of friction and understanding motion on surfaces.

Front

How do you calculate power in a physics context?

Back

Power (P) is the rate at which work is done or energy is transferred. It can be calculated using the formula P = W/t, where W is work done and t is time.

Front

What is the formula for calculating the force of friction?

Back

The force of friction (Ff) can be calculated using the formula Ff = μN, where μ is the coefficient of friction and N is the normal force.

Front

Describe the motion of an object on a frictionless inclined plane.

Back

An object on a frictionless inclined plane will accelerate down the slope due to gravity, with its acceleration dependent on the angle of the incline.

Front

What is the relationship between mass, weight, and gravity?

Back

Weight (W) is the force exerted by gravity on an object and is calculated as W = mg, where m is mass and g is the acceleration due to gravity.