Answer:
b.
c.
e.
h.
Explanation:
If we consider the ball,the tension is not balance by weight then the force acting will be non zero.It means that train car in not inertial frame of reference.And the same time the train car must accelerated with respected to the earth.It is not moving straight path.When train is in rest position but the string will be at the constant angle.
So the following option are correct:
b.
c.
e.
h.
The label means that the bulb will consume 75 joules of electrical energy in 1 sec
The force applied to raise a table to a height of 8m when 120 Joules of work is done is 15 N. That is, Force F = 15N
<h3>
What is Work ?</h3>
Work is the product of force and distance in the direction of force. Work is done on an object when the displacement of the object is in the direction of the force applied. That is,
W = F x S
The S.I unit of work is Joule.
Given that a table to a height of 8m and 120J of work was done. To find the force applies, the parameters to consider are
Make force F the subject of formula from the formula written above. That is,
F = W/S
F = 120 / 8
F = 15 N
Therefore, if the 120 Joule of work is done, the force applied to raise a table to a height of 8m is 15 Newtons.
Learn more about Work here: brainly.com/question/25573309
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Answer:
<h2>2540.16 J</h2>
Explanation:
The gravitational potential energy of a body can be found by using the formula
GPE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 9.8 m/s²
From the question we have
GPE = 72 × 9.8 × 3.6 = 2540.16
We have the final answer as
<h3>2540.16 J</h3>
Hope this helps you
Answer:
1.5 A
Explanation:
Applying
V = IR'....................... Equation 1
make I the subject of the equation
I = V/R'.................. Equation 2
Where V = Voltage, I = current, R' = Total resistance.
From the question,
In a series connection,
R' = 0.2+0.3+0.5+5 = 6 ohm.
Given: V = 9V
Substitute into equation 2
I = 9/6
I = 1.5 A.
Note: Since all the resistors are connected in series, thesame current flows through them
Therefore the current flowing through the 5 ohm resistor = 1.5 A
