Answer:
a) T = 0.5 s
b) v = 1.2π m/s ≈ 3.77 m/s
Explanation:
It makes two revolutions in one second so makes one revolution in ½ second
circumference of the circle is
C = 2πr = 0.6π m
which it traverses in one time period
0.6π m / 0.5 s = 1.2π m/s
Answer:
P = m g v
Explanation:
Power is defined as the relationship between work and time
P = W / t
The work is defined by the scalar product of the force and the displacement, in the case of a drop falling the vertical force and the displacement has the same direction, therefore the angle between them is zero and the cosines of zero is one (cos 0 = 1)
W = F y
the gravitational force is proportional to the weight of the drop (F = mg)
W = mg y
we substitute
P = m g y / t
the terminal velocity of the drop is constant
P = m g v
Mass = 60 kg
K.E = 750 J
v = ?
K.E = (1/2)mv^2
750 = (1/2) × 60 × v^2
v^2 = 150/6
v = √25
v = 5 m/s
____________________ the man should run with a velocity of 5m/s
Answer:
Yes.
Explanation:
Because the world already has so many environmental problems like global warming and pollution, just buying one eco-friendly product means you're helping the environment at that very second. So, why not just do it?
Answer:
1.67 V
Explanation:
Q = Capacitance
Q' = Capacitance after connecting in series
V = Voltage
= Voltage of battery = 5 V
As the plates opposite charge are connected together they are in series
The voltage across the 2 microfarad capacitor is 1.67 V
