Question

The speed of light, by the u symbol c, has a value, to two significant figures, of 3.0 x 108 m/s. (a) How long does it take for light to travel from the Sun to Earth, a distance of 1.5 x 10!1 m? (b) How Jong does it take light to travel from the moon to Earth, a distance of 3.8 x 108 m? 1.0 In free light travels in a straight line at constant speed, c g along a straight road. Car A maintains a constant speed of 89 km/h and car B maintains a constant speed of 125 km/h. At t -0, car B is 51 km behind car A. (a) How much farther will car A travel before car B overtakes it? 36 X km (b) How much ahead of A will B be 30 s after it overtakes A? km equations to express the positions of both cars as functions of time. Equate these expressions to determine the time at which car A is overtaken by car . Use constant-a 6 2 P068 traveling along the x axis increases at the constant rate of 3.6 m/s each second. At t - 0.0 s, its velocity is 1.1 m/s and its position is + 6.6 m. (a) How fast is it moving when its position is 8.0 m?

Answer 1