Answer is 10N to the left
To find the resultant resultant force, subtract the largest force (35N to the left) by the smallest force (25N to the right).
35 – 25 = 10N
It would be 10N to the left because the force exerted to the left is larger than the force exerted to the right.
Answer:
The correct answer is:
(a) 0
(b) 0.5 m/s
(c) 7740 N
(d) 0
Explanation:
The given values are:
mass,
m = 3000 kg
Tension,
T = 7,200 N
Angle,
= 30°
(a)
Even as the block speed becomes unchanged, the kinetic energy (KE) will adjust as well:
⇒
By using the theorem of energy, the net work done will be:
⇒
(b)
According to the question, After 0.25 m the block is moving with the constant speed
= 0.5 m/s.
(c)
The given kinetic friction coefficient is:
u = 0.3
The friction force will be:
=
On substituting the values, we get,
=
=
=
=
(d)
On including the friction,
The net work will be:
⇒
Answer:
The temperature raise is = 0.14 [C]
Explanation:
In order to find the temperature difference we must use the following equation:
But first we need to find the original volume V:
When the volume is increased the diameter will be larger:
D1 = 0.125[m] + 0.0002[m] = 0.1252[m]
Therefore the new radius will be:
r1=0.0626[m]
The new volume is:
Replacing all the calculated values in the equation:
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<span>1. The light slows down.
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Answer:
The number of turns in the solenoid is 1.95 x 10⁴.
Explanation:
given information:
the length of solenoid, L = 0.34 m
magnetic field, B = 6.5 T
current, I = 90 A
to find the number of turn in solenoid, we can start from the magnetic field equation,
B = μ₀nI, n = N/L
B = magnetic field (T)
μ₀ = permeability (4π × 10⁻⁷ T.m/A)
n = the number turn per unit length (turn/m)
I = current (A)
N = the number turn in solenoid
L = the length of solenoid
thus,
B = μ₀IN/L
N = B L/μ₀I
= (6.5) (0.34)/(4π × 10⁻⁷) (90)
= 1.95 x 10⁴ turn