During take-off from earth, an astronaut of mass 76kg has an area of contact with his seat of 0.095m^2. Calculate the average pressure on the seat when the upward acceleration of the rocket is 47ms^-2
There are two parts to this question that we should consider seperately:
Firstly, we need to work out the total thrust force that is being applied through the seat onto the astronaut. Critically, this is the sum of both his weight and the force required to produce the resultant 47ms^-2 acceleration rather that just one of these.thrust = 76 x (47 + 9.81) = 4,318N
To determine the pressure, we can use the relevant equation: Pressure = Force / Area because we know both what the total force through the seat and the area of the seat are.Pressure = 4,318 / 0.095 = 45,400 Pa to 3 significant figures
ON
Related Physics A Level answers
All answers ▸Describe how the strong nuclear force between two nucleons varies with the separation of the nucleons, quoting suitable values for separation.
A student studied how a few parameters of the electromagnetic radiation affects the I-V(current-voltage) curve of photoelectricity. By increasing one parameter he saw that the saturation current has risen. Which parameter it was?
2 identical trolleys of mass M(one is loaded with 2 blocks of mass m) are on a ramp inclined at 35° and are connected by a wire that passes around a pulley at the top of the ramp. They are released and accelerate accordingly. Show that a=(mgsin35°)/(M+m).
An ultraviolet wave of continuous frequency reflects from a solid surface back in the direction of the transmitter. Assuming no amplitude is lost, describe and explain the behaviour of the particles in the medium between the transmitter and surface.