Unbalanced as long as it is moving up or down. Immediately after being fired the vertical force from the launch will be greater than the force of gravity. for an instant at the the beginning of the projectiles decent the force will actually be balanced and there will be no vertical movement. After that the force of gravity is greater.
tl;dr they are unbalanced
Answer:
Lunar eclipse
Explanation:
Lunar eclipse occurs when Earth comes in between sun and Moon. The moon is either partially or fully blocked and the moon sighting appears to be black from earth since the light rays coming from sun are blocked by Earth. Lunar eclipse occurs only at full moon. The moon is aligned with the position of earth and sun so that they all form a straight line.
m = mass of the ball attached to friction less surface = 2 kg
r = radius of the circle in which the ball moves = 0.5 meter
T = tension force in the string = 16 N
F = centripetal force
centripetal force is given as
F = m v²/r
the centripetal force required to move in circle is being provided by the tension force here , hence we can write
T = F
T = m v²/r
Tr = m v²
v² = Tr/m
v = √(Tr/m)
inserting the values in the equation above
v = √(16 (0.5)/2)
v = 2 m/s
Answer:
0.33 mV or 0.00033 V
Explanation:
Parameters given:
Radius, r = 4 cm = 0.04 m
Number of turns, N = 1
Initial magnetic field, Bini = 0.069 T
Final magnetic field, Bfin = 0.043 T
Time, t = 0.4 secs
EMF induced in a coil is given as the time rate of change of Magnetic Flux:
EMF = -ΔΦ/t
ΔΦ = ΔB * A
Where ΔB = change in magnetic field
A = area = pi * r²
EMF = -[(Bfin - Bini) * N * pi * r²] / t
EMF = -[(0.043 - 0.069) * 1 * 3.142 * 0.04²] / 0.4
EMF = 0.00033 V = 0.33 mV