Which of the following is correct? *
1 answer:
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The gravitational potential energy U is defined as the product of mass m, the acceleration of gravity g and the height of object h.
We do not have the mass of the hiker. But we know that its W weight is:
Where
So:
.
So:
J
The hiker has gained 30,000 J of energy
The acceleration is
Explanation:
We can answer this question by using Newton's second law, which states that the net force acting on an object is equal to the product between the mass of the object and its acceleration:
where
F is the force
m is the mass
a is the acceleration
In this problem, we have
m = 25 kg is the mass of the rider+bicycle
F = 400 N is the force
Solving for a, we find the acceleration:
Learn more about Newton's second law:
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