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Front

What is work in physics?

Back

Work is defined as the product of force and displacement in the direction of the force. It is calculated using the formula: Work (W) = Force (F) × Displacement (d) × cos(θ), where θ is the angle between the force and displacement.

Front

What is the unit of work?

Back

The unit of work is the Joule (J), which is defined as the amount of work done when a force of one newton displaces an object by one meter in the direction of the force.

Front

If no displacement occurs, what is the work done?

Back

If there is no displacement, the work done is 0 J, regardless of the amount of force applied.

Front

What is the relationship between force and work?

Back

Work is directly related to the force applied and the distance over which it is applied. More force or greater displacement results in more work done.

Front

What is gravitational force?

Back

Gravitational force is the force of attraction between two masses. On Earth, it is approximately 9.81 N/kg, which is the acceleration due to gravity.

Front

How do you calculate gravitational force on an object?

Back

Gravitational force (weight) can be calculated using the formula: Weight (W) = mass (m) × acceleration due to gravity (g). For example, W = m × 9.81 N/kg.

Front

What is the significance of the angle in the work formula?

Back

The angle (θ) in the work formula determines how much of the force contributes to the work done. If θ = 0°, all the force contributes to work; if θ = 90°, no work is done.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, 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 stored energy of an object due to its position or state. For gravitational potential energy, it is calculated as PE = mgh, where h is height.

Front

What is the work-energy principle?

Back

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