What are the factors that affect the efficiency of a simple machine?
1 answer:
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Answer:
Distance covered by B is 4 times distance covered by A
Explanation:
For an object in free fall starting from rest, the distance covered by the object in a time t is
where
s is the distance covered
g is the acceleration due to gravity
t is the time elapsed
In this problem:
- Object A falls through a distance during a time t, so the distance covered by object A is
- Object B falls through a distance during a time 2t, so the distance covered by object B is
So, the distance covered by object B is 4 times the distance covered by object A.
1) The weight of the object is 1333 N
2) The mass of the object is 136 kg
Explanation:
1)
The work done when lifting an object is equal to the change in gravitational potential energy of the object:
where
F is the weight of the object
d is the distance through which the object has been moved
In this problem, we know that
W = 3200 J is the work done
d = 2.40 m is the distance through which the object has been lifted
Solving for F, we find the weight of the object:
2)
The weight of an object is given by
where
F is the weight
m is the mass of the object
g is the acceleration of gravity
In this problem, we know that
F = 1333 N is the weight of the container
is the acceleration of gravity
Solving for m, we find the mass of the container:
Learn more about work:
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