an astronaut lands on an earthlike planet and drops a small lead ball with a mass of 76.5g from the top of her spaceship.the point of release is 16m above the surface of the planet & the ball takes 2.2 s to reach the ground. the astronaut's mass on earth is 68.5kg. her wieght on th planet is?
2007-11-28 12:01:09 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics
the equation of motion for the ball is
y(t)=16-.5*a*t^2
y(2.2)=0
solve for a
a=23/2.2^2
a=4.752 m/s^2
Since mass is constant, the weight is m*a
68.5*4.752 N
325.5 N
j
2007-11-28 12:09:35 · answer #1 · answered by odu83 7 · 0⤊ 0⤋
Why dont you make your teacher really happy and work through the equation (leaving a clear and distinct trail of workings) to show you really have it for yourself? all you are doing is cheating yourself if someone else provides it for you.
2007-11-28 12:04:48 · answer #2 · answered by ? 5 · 0⤊ 0⤋