A racecar is traveling at a speed of 80.0 m/s on a circular racetrack of radius 450 m. What is the centripetal force on the
racecar if its mass is 500 kg?

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?

(a) if the pressure in gas is doubled while its volume is held constant, by what factor do (i) vrms and (ii) change? (b) is it possible to boil water at room temperature (20oc) without heating it? explain.

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s.what is the wavelength?