Free Body Diagrams - Physics 101 / AP Physics 1 Review with Dianna Cowern

In this lesson, Diana introduces free body diagrams, a tool to analyze forces acting on objects. She explains fundamental forces, focusing on gravity, and demonstrates how to draw free body diagrams for various scenarios, including projectile motion and objects in elevators. The lesson explores air resistance, terminal velocity, and the Atwood machine experiment to measure gravitational acceleration. Key takeaways include understanding net forces and solving physics problems using free body diagrams.

What is the primary purpose of using free body diagrams in physics?

• To determine the color of an object

• To calculate the speed of an object

• To represent all forces acting on an object

• To measure the temperature of an object

Which of the following is NOT a fundamental force discussed in the video?

• Gravitational force

• Weak nuclear force

• Electromagnetic force

• Frictional force

In the context of projectile motion, what is the primary force acting on an object?

• Air resistance

• Gravity

• Magnetic force

• Friction

What is the effect of air resistance on a skydiver as they fall faster?

• It decreases

• It becomes zero

• It remains constant

• It increases

What is the term used to describe the constant velocity reached by a falling object when air resistance equals gravitational force?

• Final velocity

• Average velocity

• Initial velocity

• Terminal velocity

What happens to the perceived weight of a person in an elevator when it accelerates upwards?

• It decreases

• It becomes zero

• It remains the same

• It increases

What is the Atwood machine primarily used for in the experiment?

• To measure air resistance

• To determine the mass of an object

• To calculate gravitational acceleration

• To measure the speed of light

How does the Atwood machine help in measuring gravitational acceleration more accurately?

• By increasing the speed of falling objects

• By reducing the effects of air resistance

• By slowing down the acceleration of masses

• By eliminating the need for free body diagrams

In the Atwood machine experiment, what is the significance of the tension in the rope?

• It only affects one of the masses

• It is the same for both masses

• It is different for each mass

• It causes the masses to stop moving

What is the main reason for the error in the Atwood machine experiment's measurement of gravitational acceleration?

• Inaccurate timing

• Air resistance

• Incorrect mass measurements

• Friction in the pulleys