The velocity of a car increaaes from 43.2 km/h [n] to 86.4 km/h [n] over a 3 second interval. what is the cars acceleration in m/s?

Sol. Initial velocity u = 43.2 km/hr = 12 m/s u = 12 m/s, v = 0 a = –6 m/s2 (deceleration) Distance S = (V^2-u^2)/(2 (-6)) = 12 m

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.