If a person is pushing a desk across the room, then there is an applied force acting upon the object. The applied force is the force exerted on the desk by the person. The normal force is the support force exerted upon an object that is in contact with another stable object.
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Slope in the first second: 20 m/s
Slope in the next second: 40 m/s
Average slope: 30 m/s
Explanation:
On a distance-time graph, the slope of the curve represents the speed of the object.
In fact, we have:
Speed is the ratio between distance and time, therefore
which corresponds to the slope of the line.
In this problem, we have a ball moving from 20 m to 40 m in 1 s, so
So the slope in the first second is
In the next second, the ball moves from 40 m to 80 m, so
So the slope in the next second is
While if we consider the overall graph in the 2 seconds, we have
So the average slope is
Learn more about speed:
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Answer: The answer to the question "what works all the time but never sleeps" can vary depending on the context or interpretation. Here are a few possible answers:
Explanation:
1. A machine or technology: Machines such as computers, servers, or automated systems can work continuously without needing sleep. They can perform tasks, process information, or operate machinery 24/7.
2. The human brain: While humans do need sleep for rest and rejuvenation, the brain never stops working. Even during sleep, the brain continues to regulate bodily functions, process information, and even dream.
3. Nature: The natural world is constantly active and functioning. For example, plants continue to photosynthesize, animals continue to move and hunt, and ecosystems continue to interact and evolve, even during the night.
4. Time: Time is always progressing and never stops. The concept of time keeps working, and events and processes occur continuously, regardless of day or night.
These are just a few possible answers. The correct response may depend on the specific context or intended interpretation of the question.
Answer: A man
Explanation:
A man works all day and never gets the chance to sleep.
Answer:
salt water.
sugar water