4.12 - POINTS TO PONDER
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
What happens to the forces acting on a ball at rest?
💡 Hint: Think about what happens when you throw a ball.
What is static friction's role in motion?
💡 Hint: Consider your experience pushing heavy objects.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
True or False: Force always acts in the direction of motion.
💡 Hint: Think about forces acting on objects even when they don't move.
What type of friction keeps an object stationary until a force is applied?
💡 Hint: Consider pushing heavy objects that won’t move at first.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
A 5 kg block of wood is on a flat surface. The static friction coefficient is 0.4. What is the maximum force required to move the block?
💡 Hint: Remember, static friction adjusts up to its limit according to the coefficient.
A car moves in a circle of radius 50 m at a speed of 20 m/s. Calculate the required centripetal force for a 1000 kg car.
💡 Hint: Centripetal force is often misunderstood; it's not a unique force, but results from existing ones.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.