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3 years ago

An 80 kg person jumps out of a plane. If the air resistance is 800 N, find the Acceleration.

Physics

2 answers:

sertanlavr [38]3 years ago

4 0

Answer:

The acceleration is 10 m/s²

Explanation:

The question seeks to show the relationship between force, mass and acceleration. Hence, the formula to be used here is that of force which is shown below

F = ma

where F is the force (800 N)

m is the mass (80 kg)

a is the acceleration (unknown)

From the formula above (Force = mass multiplied by acceleration)

800 N = 80 kg × a

a = 800 ÷ 80

a = 10 m/s²

Alika [10]3 years ago

4 0

Answer:

The answer is 10.

Explanation:

The values are given in the question that is,

Force=800

Mass=80

Put it in the formula of force that is

F=ma,

We have to find acceleration so it becomes,

F/m=a

a=800/80

a=10.

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3 years ago

A house has well-insulated walls. It contains a volume of 105 m3 of air at 305 K.

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Answer: $85.46\ kJ$

Explanation:

Given

Volume of air $V=105\ m^3$

Temperature of air $T=305\ K$

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Energy required to increase the temperature is

$\Rightarrow Q=nC_pdT\\\\\Rightarrow Q=n\times \dfrac{7R}{2}\times \Delta T\\\\\Rightarrow Q=\dfrac{7}{2}nR\Delta T\\\\\Rightarrow Q=\dfrac{7}{2}\times \dfrac{PV}{T}\times \Delta T\quad [\text{using PV=nRT}]$

Insert the values

$\Rightarrow Q=\dfrac{7}{2}\times \dfrac{1.01325\times 10^5\times 105}{305}\times 0.7\\ \text{Assuming air pressure to be atmospheric P=}1.01325\times 10^5\ N/m^2\\\\\Rightarrow Q=0.8546\times 10^5\\\Rightarrow Q=85.46\ kJ$