Question

一个汽车从甲地静止出发沿平直公路行驶向乙地 0-2s内,汽车以加速度a1=2M/S 做匀加速运动

Answer 1

1,

a2=V/t2=a1t1/t2=2*2/4=1m/s^2

2,

X=X1+X2+X3

=a1t1^2/2+a1t1t2+a2t2^2/2

=2*4/2+2*2*4+1*16/2

=4+16+8

=28m