contestada

a car starts from rest and accelerates from u seconds until it reaches a speed of 10ms
the car then travels at 10ms for 2u seconds.
the diagram shows the speed time graph for journey.

the distance travlled by the car in the first 3u seconds is 125m


a, find the value of U
b,find the acceleration in the first u seconds ?

Respuesta :

distance = speed* time

10x10^-3 *u + 10x10^-3 * 2u = 125

0.01u + 0.02u = 125

0.03u = 125
u = 4166.66666.... s

acceleration = (final velocity - initial velocity)/time

(10x10-3 - 0)/4167 = 2.3998 * 10^-6 m s-2

Otras preguntas