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3 years ago

the apparent weight of a body wholly immersed in water is 32N and its weight in 96N and calculate volume of the body

Physics

1 answer:

ArbitrLikvidat [17]3 years ago

3 0

Answer:

0.0065 m³

Explanation:

Apparent weight = weight − buoyancy

32 N = 96 N − (1000 kg/m³) (9.8 m/s²) V

V = 0.0065 m³

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Answer:

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as your roller coaster climbs to the top of the steepest hill on its track when does the first car have the greatest potential e

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3 years ago

If a hiker that weighs 600 newtons climbs a 50 meter hill, how much gravitational potential energy has the hiker gained?

Illusion [34]

The gravitational potential energy U is defined as the product of mass m, the acceleration of gravity g and the height of object h.

$U = mgh$

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$W = mg$

Where

$g = 9.8 m/s^2$

So:

$m = \frac{W}{g}\\\\m = \frac{600}{g}$ .

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3 years ago

The drive chain in a bicycle is applying a torque of 0.850 nm to the wheel of the bicycle. treat the wheel as a hoop with a mass

BlackZzzverrR [31]

The equivalent of Newton's second law for rotational objects is given by:
$\tau = I \alpha$
where
$\tau$ is the net torque acting on the object
$I$ is its moment of inertia
$\alpha$ is its angular acceleration

For a hoop rotating around its perpendicular axis, the moment of inertia is
$I=mr^2$
where m is the mass and r the radius. By using the data of the wheel, m=0.750 kg and r=33.0 cm=0.33 m, we find
$I=mr^2 = (0.750 kg)(0.33 m)^2=0.082 kg m^2$

and since the torque is $\tau=0.850 Nm$ , the angular acceleration of the wheel is
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4 years ago