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Newton’s Laws and Friction Study Guide 1. What is a force? __________________________________________________________ 2. What is friction? __________________________________________________________ 3. Name and describe 3 types of friction. a. ______________________________________________________________________ b. _______________________________________________________________________ c. ________________________________________________________________________ 4. State which type of friction is present in the following situations(static, rolling, sliding, fluid): a. Ice skating e. Riding a skateboard b. Pushing a box across the floor f. A leaf blowing in the breeze c. A car moving down the road g. A desk sitting still in the room d. A boat moving through the water h. A golf ball flying through the air 5. Name and describe Newton’s 3 Laws of Motion. a. _________________________________________________________________________ b. _________________________________________________________________________ c. _________________________________________________________________________ 6. Identify which of Newton’s Laws apply to the following situations: a. Slamming on brakes in a car and being d. Lying in the grass thrown forward e. An apple falling from a tree b. Rowing a boat f. Firing a rifle c. Shooting a basketball into a net 7. What is the formula for Newton’s 2nd Law of Motion? __________________________________ 8. What is acceleration due to gravity? _________________________________________ 9. The magnitude of the force of gravity between 2 objects depends on the _________________ of the objects and the _______________________ between the objects. 10. What is mass? _________________________ What is weight? ________________________ 11. How are mass and weight different? ___________________________________________________ 12. What is the formula for calculating weight? _____________________________________________ 13. What are the correct units for the following measurements? a. Mass _________ e. Velocity _______ b. Force ________ f. Weight _______ c. Acceleration ___ g. Momentum ____ d. Speed _________ h. Time _________ i. Distance ______ j. Gravity _______ 14. Solve the following problems: Be sure to show work and give correct units. a. A car sitting at a stop sign accelerates to 15m/s in 4s. What is the car’s acceleration? b. A bus covers 135.25km in 2hr. What is the speed of the bus? c. A bicycle slows down from 10m/s to 2m/s in 6s. What is the bicycle’s acceleration? d. If a 12kg bowling ball is thrown at a rate of 16m/s, what is the momentum of the bowling ball? e. What is the force of an object that has a mass of 22kg and an acceleration of 5m/s2? f. With what force would an object that has a mass of 9kg fall from a tree? g. What is the weight of a book that has a mass of 52kg? h. What is the acceleration of an object falling from the sky that has a mass of 105kg? i. What is the mass of an object falling from the sky that has a weight of 8N?