Tension pull truck problem Newtons laws review Newtons

Tension pull truck problem

Newton's laws review • Newton's first law • Things at Rest stay at rest • Things moving stay moving • Resistance to changing motion -How can inertia be changed?

• Add a 10 N vector and a 12 N vector in the same direction. • Add a 10 N vector to the right and a 12 N vector to the left • Add a 10 N vector and a 12 N vector at right angles.

Newton’s first • How much Net force is required to go a constant speed? • Does this mean NO forces act on it at all? – Give an example

Newton’s first • straight line motion • If you are swinging a bucket of water over your head… and you let go… describe the motion of the bucket.

Newton’s first • Mass vs weight. Solve 1 from the other • What is the difference? So which stays the same of diff planet? • Who would win in a fight? • snatching demo

Newton's second law • Net force causes acceleration. What is Fnet of drawing? • Acceleration can be change in direction, or change in speed or both. • Solve for m, F, a

2 nd law • a particle experiences a 200 N net force from its engines, then a big wind pushes with a force(100 N, 200 N, 300 N) in the opposite direction. describe the motion • (R&R) Box prob quiz

friction • Where does it come from? • What direction does it go? • eqn • What is mu? • Is ice more slippery for heavy people than for light people?

• Free fall vs terminal v in terms of Fnet and a

• • • Tension Chuck norris Clothes line, telephone pole lines. good idea or bad idea question. (Hanging guy) kittens on rope (conceptually determine relative tensions)

Newton’s 3 rd Law • • • hammer nail car crash gravity bug bus tug o war gun bullet

Pre-write Steve & Bob answer (#42 on back of paper) Also prep cheat sheet & packet Steve the horse says, “Bob, don’t even bother hitching me to the wagon. When I pull on the wagon it will pull back on me with an equal and opposite force, so I won’t be able to move it. ” You scratch your head and say. . . – – – – Write a complete, illustrated paragraph that includes: Topic sentence 3 FBD’s Net force Newton’s second law Newton’s third law Explanation why the forces do not cancel