Solution:
The gravitational force that acts on the bicycle system is
Now the force, that is the gravitational force is related to mass of the system and the acceleration due to gravity of the system, 'm' and 'g' respectively.
Therefore, we can write
500 = m x 10 (since , g = 10 m/s-s)
∴ m = 50 kg
Now the net vertical force acting on the student bicycle system is 0. And the vertical acceleration of system is also 0. The total horizontal force acts to the right of the system. So by Newton's 2nd law of motion, we can write
Therefore
Hence (C) is correct option.
Answer:
and .
Explanation:
From the conservation of the mechanical energy, we have that:
Since the diver is in free fall, her initial velocity is zero. So her initial kinetic energy is also zero. Then, we get:
We will first calculate the final kinetic energy. Solving for K_f, we have:
So the kinetic energy when the diver is 1.00m above the water is 1080J.
Finally, we solve for the final potential energy U_gf:
In words, the gravitational potential energy when she is 1.00m above the water is 539J.
Answer:
D
Explanation:
The atmosphere is made up of constituents not chemically combined unlike the rest of the options...
The atmosphere is made up of O2, N2, etc. and they are not chemically combined, hence the atmosphere is a mixture