Question

A body of mass 1 kg is thrown upwards with velocity of 10m/s comes to rest ( momentarily) after moving up 4m. What is the work done by air drag in this process.





answer for brainliest

Answer 1

1000/10=100
so work done =100 multiple 4=400

Answer 2

work = force × displacement
we have to calculate force then we need acceleration for acceleration we use the third kinematics equation which is

${v }^{2} = {u}^{2} + 2as$
here v is final velocity
u is initial velocity
a is acceleration
s is distance travelled
keeping the value in the formula we got acceleration is equals 12.5m/S2

force is equals mass into acceleration then the masses 1 kg acceleration is equal to 12.5
force is 12.5kg m/S2