Answer:
1. B- kinetic to gravitational potential energy
2. A-gravitational to kinetic energy
Explanation:
When the train goes up the hill, the kinetic energy decreases (the speed decreased) due to the pull of gravity.
When the train goes down the hill, the speed increases (kinetic energy increases) and since the object is coming downwards the gravitational potential energy decreases
Answer:
6.45 x 10^5 N/C
Explanation:
q = + e = 1.6 x 10^-19 C
m = 9.99 x 10^-27 kg
V = 13 kV = 13000 V
B = 1 T
Let v be the speed and E be the strength of electric field.
1/2 mv^2 = eV
v^2 = 2 e v / m
v^2 = (2 x 1.6 x 10^-19 x 13000) / (9.99 x 10^-27)
v = 6.45 x 10^5 m/s
As the charge particle is undeflected, the force due to magnetic field is counter balanced by the force due to electric field.
q E = q v B
E = v B = 6.45 x 10^5 x 1 = 6.45 x 10^5 N/C
False
It is experiencing net force