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3 years ago

On what factors does the weight of an object depend

Physics

2 answers:

Alex17521 [72]3 years ago

7 0

It depends on two factors:

1) MASS OF THE OBJECT

2) GRAVITY

Evgesh-ka [11]3 years ago

5 0

Answer: Mass and acceleration due to gravity

Explanation:

Weight of the body is defined as the product of the mass of the and the acceleration due to gravity

Mathematically,

$W=mg$

Where,

W = weight of the body

m = mass of the body

g = acceleration due to gravity

Hence, mass and acceleration due to gravity are the two factors on which weight of the body depends.

Weight of the body does not remain constant because the value of 'g' is not constant all over the space.

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A particular automotive wheel has an angular moment of inertia of 12 kg*m^2, and is decelerated from 135 rpm to 0 rpm in 8 secon

lozanna [386]

Answer:

(A) Torque required is 21.205 N-m

(b) Wok done will be equal to 1199.1286 j

Explanation:

We have given moment of inertia $I=12kgm^2$

Wheel deaccelerate from 135 rpm to 0 rpm

135 rpm = $135\times \frac{2\pi }{60}=14.1371rad/sec$

Time t = 8 sec

So angular speed $\omega _i=135rpm$ and $\omega _f=0rpm$

Angular acceleration is given by $\alpha =\frac{\omega _f-\omega _i}{t}=\frac{0-14.1371}{8}=--1.7671rad/sec^2$

Torque is given by torque $\tau =I\alpha$

$=12\times 1.7671=21.205N-m$

Work done to accelerate the vehicle is

$\Delta w=K_I-K_F$

$\Delta W=\frac{1}{2}\times 12\times 14.137^2-\frac{1}{2}\times 12\times0^2=1199.1286J$

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