Question

I'll Give medal :)
1 Two masses of 7kg and 3kg respectively are hanging on a frictionless pulley... Calculate the acceleration due to gravity...

2 at given t taken a body at rest which then moves with an acceleration, after 3sec its momentum is?

3 work done by a constant source of 1kW power that is 1000 J per sec in one hr is?

4 In diffraction experiment, something done by moving apparatus away from screen such that plane wave fronts are obtained! This describes ??

Answer 1

@AllTehMaffs

Answer 2

need pic, please

Answer 3

for question 1