Work and Energy Lecture

What is the definition of work in physics?

• Force applied over a distance
• Energy transferred by heat
• Mass times acceleration
• The ability to do something

According to Newton's second law, what does the equation F = m × a represent?

• Work done on an object
• The relationship between force, mass, and acceleration
• The definition of energy
• The speed of an object

Tags

NGSS.HS-PS2-1

When you throw a bowling ball, what happens to its kinetic energy?

• It decreases
• It remains the same
• It increases
• It becomes potential energy

Tags

NGSS.HS-PS3-2

What is negative work?

• Work that adds energy
• Work that removes energy
• Work done against gravity
• Work done in a vacuum

What does the work-energy theorem state?

• Work done on an object changes its potential energy
• Work done on an object changes its kinetic energy
• Work is always positive
• Energy cannot be created or destroyed

What happens to a ball when it is dropped?

• It gains potential energy
• It gains kinetic energy
• It loses all energy
• It remains at rest

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

When you throw a ball upwards, what type of work does gravity do?

• Positive work
• Negative work
• No work
• Constant work

Tags

NGSS.HS-PS3-2

If multiple forces act on an object, what must you calculate to determine its acceleration?

• The average force
• The net force
• The gravitational force
• The frictional force

Tags

NGSS.HS-PS2-1

In the example of moving a heavy moving box, what type of work does friction do?

• Positive work
• Negative work
• No work
• Constant work

Tags

NGSS.MS-PS3-5

When lifting a puppy slowly, what is the relationship between the work done and the gravitational force?

• Both do positive work
• Both do negative work
• They do equal but opposite work
• Only one does work