Answer:
B) 5
Explanation:
Mechanical advantage = D/W
= 10/2
= 5.
It has no unit because the inches in the length and width will cancel out.
Answer: The kinetic energy of the block increases by 15 Joules.
Explanation:
Work done is defined as the product of force and displacement of the object.
Mathematically,
where,
W =work done
F = force
s = Displacement
Kinetic energy is defined as the energy which is possessed by the virtue of object's motion.
In the question, it is given that work done on block is 15 Joules and we need to find the change in kinetic energy of the block.
We know that,
Work done on the object = Change in kinetic energy of the object
Thus, Kinetic energy is increased by 15 Joules.
The kinetic energy depends on the work done by the applied force. The kinetic energy of the block increases by 15 J.
The energy possessed by an object by its motion is known as the object's kinetic energy.
Given data-
The magnitude of the constant horizontal force is F = 5 N.
The work done on the block is, W = 15 J.
As per the work-energy theorem, the work done by the applied force is equal to the change in kinetic energy.
Then,
W = ΔKE
Solving as
15 = ΔKE
ΔKE = 15 J
Thus, we can conclude that the block's kinetic energy increases by 15 J.
Learn more about kinetic energy here:
b. voltage.
c. resistance.
d. all of these
Game-based learning tools are used for children only.
Game-based learning tools are used for children only.
Knowledge can be acquired throughout your life, through both formal and informal methods.
Knowledge can be acquired throughout your life, through both formal and informal methods.
Virtual reality simulations are being used for training in industries like healthcare and the armed forces.
Virtual reality simulations are being used for training in industries like healthcare and the armed forces.
Changes in technology both enable and require lifelong learning.
Changes in technology both enable and require lifelong learning.
Lifelong learning involves formal learning activities only.
B) Electrons are added to two negatively charged objects.
C) Two oppositely charged objects are moved farther apart.
D) The charge on two positively charged objects is reduced.
By definition we have that the electric force is given by:
Where,
k: proportionality constant
q1: electric charge of object 1
q2: electric charge of object 2
d: distance between both objects
Therefore, to increase the electric power there are two possible cases:
1) Add more load to each object
2) Decrease the distance between objects.
The option that increases the electric force for this case is:
Electrons are added to two negatively charged objects.
This is because the values of q1 and q2 increase.
Answer:
A change that increases the electric force between objects is:
B) Electrons are added to two negatively charged objects.
Answer
B) Electrons are added to two negatively charged objects.
Explanation:
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