Answer:
A. = 26.11kJ
B = 0N
Explanation:
Mass = 86.2kg
Distance (s) = 32m
Angle of the slope = 15°
a. Work done due to gravity
W = force * distance * angle of displacement
W = F * S * cos θ
Force = mass * acceleration due to gravity
Force = 86.2 * 9.8
Force = 844.76N
Work = 844.76 * 32 * cos 15
Work = 26111.21J
Work = 26.11kJ
b. The workdone by the normal force is equal to zero since the normal force is perpendicular to the displacement.
Hence the normal force does not act on the body.
N = 0N
Explanation:
the missing figure in the Question has been put in the attachment.
Then from the figure we can observe that
the center of the sphere is positive, therefore, negative charge will be induced at A.
As B is grounded there will not be any charge on B
Hence the answer is A is negative and B is charge less.
Answer:3.67 m/s
Explanation:
mass of block(m)=2 kg
Velocity of block=6 m/s
spring constant(k)=2 KN/m
Spring compression x=15 cm
Conserving Energy
energy lost by block =Gain in potential energy in spring
Answer:
The tension increases to four times its original value.
Explanation:
v = Velocity
r = Radius
m = Mass of stone
The centripetal force is
The tension will balance the centripetal force
The new tension will be 4 times the old tension
Answer:
The quantity of charge or electron flowing the wire in the given time is 4.5 x 10¹⁹ electrons.
Explanation:
Given;
emf of the battery, V = 12 V
resistance of the resistor, R = 100-Ω
time of current flow, t = 1 min
charge of 1 electron = 1.602 x 10¹⁹ C
The current through this circuit is given by;
I = V / R
I = (12) / (100)
I = 0.12 A
The quantity of charge or electron flowing the wire in the given time is calculated as;
Q =It
where;
I is the current flowing through the wire
t is the time of current flow = 1 x 60s = 60 s
Q = 0.12 x 60
Q = 7.2 C
1.602 x 10⁻¹⁹ C --------------- 1 electron
7.2 C -----------------------------? electron
Therefore, the quantity of charge or electron flowing the wire in the given time is 4.5 x 10¹⁹ electrons.