Answer:
Coefficient of friction is the ratio of friction force to normal force.
μ = F/N
Weight = (mass) x (acceleration of gravity).
When I calculate the weight of the 81.6 kg, the number I use for gravity
is 9.807 m/s². That gives a weight of 800.25 N, so I think that's where the
question got the crazy number of 81.6 kg ... whoever wrote the problem
wants the hay to weigh 800 N, and that's what I'll use for the weight.
The forces on the bale of hay are gravity: 800N downward, and the
guy on the truck with the pitchfork pulling upward on it with 850 N.
The net force on the bale is (850 - 800) = 50 N upward.
Use Newton's second law of motion: (Net force) = (mass) x (acceleration)
Divide each side by 'mass' :
Acceleration = (net force)/(mass)
On the hay wagon,
Acceleration = (50 N upward) / (81.6 kg) = <em>0.613 m/s² upward</em>
Answer:
The field gets weaker
Explanation:
I’m taking the test right now, hope this helps!!
In energy production, possible sources are fossil fuels like coal, petroleum and natural gas. Other sources are renewable like hydro, solar and wind. Radioactive elements are also possible sources for nuclear energy. However, energy will always dissipate. Industries could never get 100% of the energy from their sources. In ideal cases like the Carnot engine, we can only get 60% of the energy. That is ideal. In actual, we get even lesser than this for about 40%.
When the efficiency is 60%, the used energy is 60%, while the wasted energy is 40%. Therefore, the wasted energy is
1000 BTU (0.40) - 400 BTU
The waste energy in the form of electricity is 400 BTU.
Distance in the y direction.