Answer:
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Explanation:
The wheel and axle is a simple machine consisting of a wheel attached to a smaller axle so that these two parts rotate together in which a force is transferred from one to the other.
Answer:
1863 J
Explanation:
F = Force moving the object
f = Frictional force = 230 N
The forces in the horizontal direction have the force balance
So, the force by which the object is being pushed is
s = The displacement of the object = 8.1 m
Work done is given by
The work done by the mover is 1863 J.
Answer:
30000 J = 30 kJ
Explanation:
Kinetic energy is the energy possessed by a moving object solely due to its motion.
You can get the K.E. of an object using the equation,
K.E. =
So you get,
K.E. =
= 30000 J = 30 kJ
Answer: M = 42.553· kg
Explanation: A orbit where a body remains traveling around a gravitating mass at constant radius is called Circular Orbit. Although in reality the orbit is more like an ellipse, the circular orbit is a good approximation to the real one.
In that system, it is possible to determine the velocity needed to maintain the orbit. The formula is: v = , where:
v is velocity;
G is the gravitational constant( = 6.67·)
M is the mass of the gravitating mass;
r is the distance between the center of the massive object and the orbiting object;
But, this question is asking for the mass M, so, rearraging:
Transforming light-years in metres and dividing by 2 to find the radius:
r = (15.9.461 x 10¹⁵)· = 70.9575
M =
M = 42.553.kg
The mass of the massive object at the center of the ring is 42.553.kg.