DO NOW 91

Front

What is work in physics?

Back

Work is defined as the product of the force applied to an object and the distance over which that force is applied, in the direction of the force. It is measured in joules (J).

Front

What is the formula for calculating work?

Back

Work (W) = Force (F) × Distance (d) × cos(θ), where θ is the angle between the force and the direction of motion.

Front

What is the unit of work?

Back

The unit of work is the joule (J). 1 joule is equal to 1 newton meter (N·m).

Front

If no displacement occurs, what is the work done?

Back

If there is no displacement, the work done is 0 joules (0 J).

Front

What does it mean if work is zero?

Back

Work is zero when either the force applied is zero, or the object does not move in the direction of the force.

Front

What is the relationship between force and work?

Back

Work is directly related to the force applied; greater force results in more work done, provided there is displacement.

Front

What is gravitational force?

Back

Gravitational force is the force of attraction between two masses, such as the Earth and an object, typically measured in newtons (N).

Front

What is the value of gravitational acceleration on Earth?

Back

The value of gravitational acceleration on Earth is approximately 9.81 m/s².

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 is 0°, all force contributes, if θ is 90°, no work is done.

Front

What is kinetic energy?

Back

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