[LSP] Review for Work, Power, and Energy

What is the scientific definition of work?

• Any force applied to an object

• The amount of energy an object has

• The rate at which energy is transferred

• The product of force and displacement in the direction of the force

How is work related to energy?

• A. Work is a form of energy

• B. Work and energy are unrelated concepts

• C. Energy can exist without work being done

• D. Work is the transfer of energy from one object to another

In which situation is work being done?

• A. A ball sitting on a table

• B. A student pushing a chair across the floor

• C. A person holding a heavy box without moving

• D. A car moving at a constant velocity on a frictionless road

A 100 N force is applied to move a box 5 meters. How much work is done if the force is applied in the direction of movement?

• 20 J

• 50 J

• 100 J

• 500 J

How is power related to work?

• A. Power and work are the same

• B. Power is the total energy of an object

• C. Power is the rate at which work is done

• D. Power is the energy stored in an object

What is the main difference between potential and kinetic energy?

• Potential and kinetic energy are identical

• Kinetic energy is always greater than potential energy

• Potential energy is due to motion, while kinetic energy is due to position

• Potential energy is stored energy, while kinetic energy is energy of motion

If an object is moving without external forces, what happens to its total mechanical energy?

• A. It remains constant

• B. It increases over time

• C. It decreases over time

• D. It disappears completely

How does the speed of an object affect its kinetic energy?

• Speed does not affect kinetic energy

• Kinetic energy increases as speed decreases

• Kinetic energy is directly proportional to speed

• Kinetic energy is proportional to the square of speed

What is the gravitational potential energy of a 10 kg object lifted to a height of 5 m?

• 50 J

• 500 J

• 100 J

• 5000 J

A 2 kg ball is moving at a velocity of 3 m/s. What is its kinetic energy?

• 3 J

• 6 J

• 9 J

• 12 J