Answer:
v=2.13 m/s
Explanation:
Given that
L= 3 ft
We know that
1 ft = 0.3048 m
L=0.91 m
a= g/2
F= m a
F= m g/2 = K L
k= (mg)/(2L)
Now from energy conservation
Kinetic energy of train = potential energy of the spring
k= (mg)/(2L)
By putting the values
( take g =10 m/s²)
v=2.13 m/s
A long solenoid that has 1 000 turns uniformly distributed over a length of 0.400 m produces a magnetic field of magnitude [math]1.00 \times 10 ^ { - 4 ...
P=m x v =60 x 7.0= 420
total momentum = 420 x 2,000,000,000=dnt have a calculator
thier effect would shake the earth and kill some organism because they jump up at the same time and they wil probably land the same time .
We can define power as the rate of doing work, it is the work done in unit time. The SI unit of power is Watt (W) which is joules per second (J/s). Sometimes the power of motor vehicles and other machines are given in terms of Horsepower (hp) which is approximately equal to 745.7 watts.
Power is the rate at which a force is applied to an object for example.current wire
b) mobile charge carriers have mass (possess inertia) which resists their motion