== 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 !
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.
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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B) automobiles
C) trains
D) submarines
O ou
O su
50 u
o 500
O
1000 J
The total amount of work done will be "50 J". To understand the calculation, check below.
According to the question,
Force, F = 5N
Distance, d = 10 m
We know the formula,
→ Work = Force × Distance
or,
→ W = F × d
By substituting the values, we get
= 5 × 10
= 50 N/m or,
= 50 J
Thus the response above is correct.
Find out more information about force here:
Answer:
50N/m or 50J
Explanation:
Work is defined as product of force & distance. Hence per the parameters,
Force = 5N and Distance is 10m
Therefore Work =F x d
Work = 5N x 10m
Work =50N/m or 50J
A hammer and a feather will fall with the same constant acceleration if air resistance is considered negligible. This is a general characteristic of gravity not unique to Earth, as astronaut David R. Scott demonstrated on the Moon in 1971, where the acceleration due to gravity is only 1.67 m/s2.
The acceleration due to gravity is the same for all objects near the surface of the Earth, regardless of their mass. The effect of air resistance may make it appear that the acceleration of a feather is smaller than that of an iron ball.
Acceleration due to gravity refers to the rate at which an object falls toward the Earth under the influence of gravity. The value of acceleration due to gravity varies depending on the location and mass of the object.
In general, the acceleration due to gravity is the same for all objects near the surface of the Earth, regardless of their mass. This means that the acceleration due to gravity of a feather is the same as that of an iron ball. However, due to the difference in air resistance, a feather will experience a much smaller net force compared to an iron ball, which may give the illusion of a slower acceleration.
Therefore, the acceleration due to gravity of a feather is not smaller than that of an iron ball, but the effect of air resistance makes it appear so.
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b. Lithium
c. Nitrogen
d. Magnesium