Select the correct answer.
2 answers:
The gravitational potential energy of the object is B) 84 Joules
Explanation:
The gravitational potential energy (GPE) of an object is the energy possessed by the object by virtue of its position in a gravitational field.
Near the Earth's surface, the GPE of an object is calculated as:
where:
m is the mass of the object
is the acceleration of gravity
h is the heigth of the object relative the surface
For the object in this problem:
m = 5.24 kg
h = 1.63 m
So, its GPE is
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Answer:
1000 Nm
2000 Nm
1.00007 seconds
Explanation:
I = Moment of inertia = 5 kgm²
= Angular acceleration
= Final angular velocity
= Initial angular velocity
t = Time taken
Torque is given by
The torque of the disc would be 1000 Nm
If
The torque of the disc would be 2000 Nm
From equation of rotational motion
It would take 1.00007 seconds to reach 3820 rpm