If a 60kg girl jumps out of a helicoptor, draw diagrams to show the forces (with values) acting on her when a) she is in freefall, b) she is accelerating at half of g (g = 10 m/s^2), c) she is travelling at a constant speed?
a) 600N arrow down for weight, no air resistance arrow, acceleration = 10m/s^2
b) 600N arrow down, 300N arrow up for air resistance, acceleration = 5m/s^2 (Using F = ma)
c) 600N arrows up and down (forces balanced), no acceleration
EJ
Related Physics GCSE answers
All answers ▸In most transformers, why is the power output is less than the power input.
According to Newton's third law, every action has an equal and opposite reaction. Why then does a box move when I push it? Shouldn't the two opposing forces cancel out to a zero net force?
Simon's car has run out of fuel. He must push his car 5 metres to the petrol pump, using a force of 200N. How much work does Simon do?
what is a half life of a substance and how can you work it out.