tessy

what is greater than 7.8 but less than 7.9

simplify5/8 of (5.2 this in whole number) -3/4 + 3/5 divided by 64/125 -2/3

evaluate 2 divided by 64/125 -2/3

a stone of mass 200g falls from a height of 5m with a velocity of 1.5m. assuming g=10m/s, calculate the 1]potential energy 2]kinetic energy 3]velocity just before hitting the ground

1]potential energy p.e=mgh m=200g, convert by dividing, 200 divided by 1000=0.2kg g=10 h=5m 0.2kg x 10 x 5=10j 2]kinetic energy k.e=1/2 mv2 m=0.2 v=1.5 =1/2 x 0.2 x 1.5 =1/2 x 0.2 x 2.25 =1/2 x 0.45 =0.225j 3]velocity v=gh=1/2 v2 gh/1=v2/2 gh x2=2gh, v2 x...