Work and Energy Flashcardziz

Front

What does the Work Energy Theorem state?

Back

The Work Energy Theorem states that the change in kinetic energy of an object is equal to the work done on that object.

Front

Is the Work Energy Theorem applicable to thermal energy?

Back

No, the Work Energy Theorem specifically relates to kinetic energy, not thermal energy.

Front

How do you calculate kinetic energy?

Back

Kinetic energy (KE) is calculated using the formula KE = 0.5 * m * v^2, where m is mass and v is velocity.

Front

If a 0.34 kg object has a kinetic energy of 135 Joules, what is its velocity?

Back

28.18 m/s.

Front

What is the formula to find the final velocity of an object falling from a height?

Back

The final velocity (v) can be calculated using the formula v = sqrt(2 * g * h), where g is the acceleration due to gravity (9.81 m/s²) and h is the height.

Front

What is the final velocity of an object dropped from a height of 32 m?

Back

25 m/s.

Front

How do you find the velocity of an object falling from a height of 2.1 m?

Back

Use the formula v = sqrt(2 * g * h). For h = 2.1 m, v = 6.42 m/s.

Front

What is the acceleration due to gravity on Earth?

Back

The acceleration due to gravity on Earth is approximately 9.81 m/s².

Front

What is work in physics?

Back

Work is defined as the energy transferred to or from an object via the application of force along a displacement.

Front

What is the unit of work?

Back

The unit of work is the Joule (J), which is equivalent to one Newton meter.