Answer:
Explanation:
According to the law of conservation of energy, the total energy of the system can be expresed as the sum of the potential energy and kinetic energy:
When the spring is in its equilibrium position, that is , the object speed its maximum. So, we have:
In order to double its maximum speed, that is . We have:
Answer:B
Explanation:
Given
mass of sledge=82 kg
Force on sledge=160 N
degree
force has two component sin and cos
Normal reaction
Answer:169.6m/s
Explanation:
Wavelength=32cm=0.32m
Frequency=580Hz
Velocity=frequency x wavelength
Velocity=580x0.32
Velocity=169.6m/s
<span>The person is dragging
with a force of 58 lbs at an angle of 27 degrees relating to the ground. We
want to use cosine function to look for the horizontal force component. And
then we can compute for W = (Horizontal Force) x (Distance). We want the
horizontal force component since that is the component that is parallel to the
direction the cart is moving. </span><span>
(cos 27 degrees)(58 lbs) = 51.69 lbs (This is the horizontal
force component.)
W = (51.69 lbs) x (70 ft) = 3618.3 ft*lbs</span>
<h2>Answer:</h2>
The sun emits radiation in wavelengths of 10nm to 1mm.
<h3>Explanation:</h3>
The sun emits radiations of different types in electromagnetic spectrum.
99% of radiations are :
- Visible light: 400nm to 700nm
- Ultraviolet rays: 10nm to 400nm
- Infrared rays: 700nm to 1mm