Newton's 2nd Law (9 of 21) Calculate Acceleration with Friction; Inclined Plane, One Mass | Summary and Q&A

TL;DR

Calculate the acceleration of an object moving down a 19° incline plane with a coefficient of friction of 0.25.

Key Insights

• ✈️ Determining acceleration on an incline plane involves considering forces like gravity and friction.
• ☺️ The X component of the weight force contributes to the acceleration down the incline plane.
• ❓ The friction force opposes the motion of the object and can be calculated using the coefficient of friction and the normal force.
• 💆 The mass of the object does not affect the acceleration, as it cancels out in the final calculation.
• 🏋️ Trigonometry is used to calculate the X and Y components of the weight force.
• 👮‍♂️ Newton's second law, F=ma, is used to determine the acceleration of the object.
• ☺️ The acceleration can be calculated by summing the forces in the X direction and dividing by the mass of the object.

Transcript

okay in today's video I'm going to go over a problem where we're going to determine the acceleration of an object that's moving down an incline plane and there's friction between the object and the incline plane and this is the question we're going to answer we have a 7.5 kgam object it's accelerating down a 19 Dee incline plane there's a coefficie... Read More

Questions & Answers

Q: How is the acceleration of the object determined?

The acceleration is determined by using Newton's second law and considering the forces acting on the object, such as gravity and friction.

Q: What is the relationship between the coefficient of friction and the friction force?

The friction force is equal to the coefficient of friction multiplied by the normal force.

Q: Does the mass of the object affect the acceleration?

No, the mass of the object does not affect the acceleration. The acceleration is solely determined by the forces acting on the object.

Q: How are the X and Y components of the weight force calculated?

The X component is calculated using the formula mg * sin(θ), and the Y component is calculated using the formula mg * cos(θ).

Summary & Key Takeaways

• A 7.5 kg object is accelerating down a 19° incline plane with a coefficient of friction of 0.25.

• The forces involved in determining the acceleration are gravity, normal force, and friction.

• Using trigonometry and Newton's second law, the acceleration is calculated to be 0.87 m/s².