How much power is required to push a box 4.0 m with a force of 150 N in 2.5s? A. 15W
B. 1500W
C. 240W
D. 94W
Answers
Answer
the anser is (C) as 240 Watt
Explanation
As we know that
As given in question
Force = 150 N
Distance = 4m
Then work is
So the answer is 240 watt
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A She can run the same distance in a shorter amount of time.
Explanation:
Jill can achieve a higher average speed than Jenna if she runs the same distance in a shorter amount of time.
Speed is a physical quantity that deals with the rate of change of distance with time:
Speed =
The distance traveled is the length of the path covered and time taken is the duration.
To achieve a higher speed, it would be desired to have a lower time and the distance covered steadily increasing or staying the same.
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== You're pushing the load straight along the horizontal surface at a constant speed.
== The speed and direction of the load are not changing, so there is no acceleration.
== From Newton's 2nd law of motion, we know that F = m A . Since A=0, F must also be zero. That means NO NET FORCE is acting on the load.
== But how can that be ? You're pushing it with 90 N !
== The NET force is zero. So something else must be pushing the box, also with 90 N of force, exactly opposite to YOUR force, and they add up to zero.
== THERE's your force of friction !
Final answer:
In this case, the force of friction is 90.0 N. This is inferred from the fact that the object is moving at a constant speed, implying that the force applied is countered by an equal force of friction. This is an application of Newton's first law of motion.
Explanation:
The force of friction can be determined by using the basic principles of physics. In the scenario presented, the box is being moved at a constant speed, which implies that the force of friction is equal to the force applied, 90.0 N. This is because when an object moves at a constant speed, it suggests there is a balance of forces meaning the force you're applying (90.0 N in this case) is battling against an equal force in the opposite direction, this opposing force being the force of friction.
This applies the principles of Newton's first law - an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. This equilibrium of forces is what's keeping the box moving at a constant speed.
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Answers
Solid, liquid, or gas.
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- silver is an element whose atoms have atomic number 47 (i.e., an atom of silver contains 47 protons and 47 electrons)
- gold is an element whose aroms have atomic number 79 (i.e., an atom of gold contains 79 protons and 79 electrons)
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Answer..
C
Explanation:
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