利用匀变速直线运动的推论有:
vC=
xBD
2T=
0.8573−0.7018
0.04=3.89m/s
重物由O点运动到C点时,重物的重力势能的减少量为:
△Ep=mgh=0.1×10×0.7776 J=0.778J.
EkB=
1
2mvE2=
1
2×0.1×(3.89)2=0.757m
故答案为:3.89,0.778,0.757;
利用匀变速直线运动的推论有:
vC=
xBD
2T=
0.8573−0.7018
0.04=3.89m/s
重物由O点运动到C点时,重物的重力势能的减少量为:
△Ep=mgh=0.1×10×0.7776 J=0.778J.
EkB=
1
2mvE2=
1
2×0.1×(3.89)2=0.757m
故答案为:3.89,0.778,0.757;