Question

if mass and radius of the earth are 6.0*10^24 kg and 6.4*10^6m respectively calculate the force exerted by the Earth on a body of mass 1 kg. Also calculate acceleration produced in the body of mass 1 kg and acceleration produced in the earth

Answer 1

d= volume of the oil drop/ area of the film

 

= 4/3 *pi* (0.025cm)^3/(pi* (10 cm)^2

 

= 2.08X10^-7 cm

Answer 2

F = GMm / r^2

= (6.7 × 10^-11 × 6 × 10^24 × 60) / (6.4 × 10^6)^2

= 588.9 N

A force of 588.9 is being acted on my friend.