* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download File
Survey
Document related concepts
Specific impulse wikipedia , lookup
Coriolis force wikipedia , lookup
Classical mechanics wikipedia , lookup
Fictitious force wikipedia , lookup
Jerk (physics) wikipedia , lookup
Centrifugal force wikipedia , lookup
Relativistic mechanics wikipedia , lookup
Newton's theorem of revolving orbits wikipedia , lookup
Equations of motion wikipedia , lookup
Seismometer wikipedia , lookup
Center of mass wikipedia , lookup
Rigid body dynamics wikipedia , lookup
Work (physics) wikipedia , lookup
Classical central-force problem wikipedia , lookup
Centripetal force wikipedia , lookup
Transcript
Newton’s Second Law • http://www.classzone.com/books/ml_science _share/vis_sim/mfm05_pg50_newton/mfm05 _pg50_newton.html • What conclusions can you draw about force, mass, and acceleration from this simulation? Newton’s Second Law If you increase the mass… • More force required to produce the same acceleration • OR the same force will produce less acceleration 0.2 kg 3,500 kg To increase the acceleration… • Apply more force to the same mass • OR decrease the mass What if I increase the force? • The same mass will accelerate faster • An object with more mass will accelerate the same Units, units, units! • Force = mass x acceleration – Force measured in newtons (N) – Mass measured in kilograms (kg) – Acceleration measured in m/s2 • What are m/s2? – Acceleration = change in velocity over time Velocity Time = m/s s “meters per second per second” Let’s go back to the shopping carts… • http://www.classzone.com/books/ml_science _share/vis_sim/mfm05_pg50_newton/mfm05 _pg50_newton.html • Does this equation seem to apply? One more note… • Forces in Newton’s 2nd law must be external to the object on which they are acting!!! Let’s practice! • Find the mass of an object that accelerates 5 m/s2 when pushed with a force of 25 N • Find the acceleration of an object with a mass of 2 kg that is pushed with a force of 6 N • Find the acceleration of an object with a mass of 2 kg that is pushed with a force of 6 N How is this related to Newton’s 1st law? • The more mass an object has, the more inertia that object has, so you need more force to change the object’s motion Acceleration due to gravity • On earth, this is a constant (g) • g = 9.8 m/s2 Your turn! • Complete the remaining problems on the Newton’s 2nd Law handout Exit ticket • How much force would you need to apply to a 200 kg cart to accelerate the cart 5 m/s2? Show your work and include units! What factors must come together to produce change?