2, gia toc vat co duoc la $a=\frac Fm=1m/s^2=>s=\frac12at^2=12,5(m)$ta co $A=F.s=25(J)$3,$Wc=Wd+Wt=\frac12mv^2+mgh=120J$b,ta co$W_d=\frac54W_t=>W_t=\frac49W_c=\frac{160}3J=>h=\frac{80}3m$
2, gia toc vat co duoc la $a=\frac Fm=1m/s^2=>s=\frac12at^2=12,5(m)$ta co $A=F.s=25(J)$3,$Wc=Wd+Wt=\frac12mv^2+mgh=120J$b,ta co$W_d=\frac54W_t=>W_t=\frac49W_c=\frac{160}3J=>h=\frac{80}3m$
2, gia toc vat co duoc la $a=\frac Fm=1m/s^2=>s=\frac12at^2=12,5(m)$ta co $A=F.s=25(J)$3,$Wc=Wd+Wt=\frac12mv^2+mgh=120J$b,ta co$W_d=\frac54W_t=>W_t=\frac49W_c=\frac{160}3J=>h=\frac{80}3m$