Answer:
A
Explanation:
Lance was never a bright young fella so he rolled down a hill and lost his left boot
Let be the distance between the base of the ladder and the bottom of the wall, and the distance between the top of the ladder and the bottom of the wall, so that
Differentiate both sides with respect to time :
When , the top of the ladder is
above the ground. Then, given that the bottom of the ladder slides away from the wall at a rate of , we have
That is, the top of the ladder is sliding downward at a rate of 0.24 ft/s.
Work is measured in joules, so you're question was already answered! 75 joules of work was required.
However, if you're asking about the force that was required, you're answer would be 25 N of force.
work= force x distance
75= f x 3
75= 25 x 3
Answer:
The average speed of the whole journey is, v = 172 km/h
Explanation:
It is given that, a fast humvee drove from desert a to desert b. The scenario is as follows :
For the first 12 hours, it traveled at an average speed of 185 km/h. Let d₁ is distance. So,
For the next 13 hours, it traveled at an average speed of 160 km/h. Let d₂ is the distance. So,
Average speed = total distance/time taken
So,
Therefore, the average speed of the whole journey is 172 km/h.
<h3><u>Answer;</u></h3>
Proportional to the charge of the magnet
<h3><u>Explanation</u>;</h3>
- <em><u>A magnet is a substance or a material that has the capability of producing magnetic field.</u></em> Magnets may repel or attract poles of another magnet. based on the basic law of magnetism, like poles of magnets repel each other while unlike poles of magnets attracts each other.
- Therefore, <em><u>magnets exerts forces on each other. These forces of attraction field of magnets are as a result of currents of electrically charge electrons orbiting in the nuclei of the particles that are in the material making up the magnet. </u></em>The strength of these forces is proportional to the charge of the magnet.
<h3><u>Answer;</u></h3>
counterclockwise in the horizontal plane
<h3><u>Explanation;</u></h3>
- Using the right hand grip rule, the direction of magnetic field produced by a current carrying conductor or wire can be determined.
- <em><u>Right hand grip states that if one grasps the wire or the conductor using the right hand, such that the thumb points the direction of the current, then the other four fingers shows or points the direction of the magnetic field produced.</u></em>
- Therefore,<em><u> if the direction of the current is upward then using the right hand grip rule the direction of magnetic field will be counter clockwise on a horizontal plane.</u></em>