Answer:
40 ms¯².
Explanation:
To solve this problem, we shall illustrate the question with a diagram.
The attached photo gives a better understanding of the question.
From the attached photo:
Velocity (v) = 160 ms¯¹
Time (t) = 4 secs.
Acceleration (a) =?
Acceleration (a) = Velocity (v) /time (t)
a = v/t
a = 160/4
a = 40 ms¯²
Therefore, the initial acceleration of the rocket is 40 ms¯².
Answer:
Choice d. All three balls listed in choice a, b, and c have a momentum of each, same as that of the
ball moving at
. Assumption: all four balls are moving in the same direction.
Explanation:
The momentum of an object is equal to the product of its mass
and its velocity
.
Momentum of a ball moving at
:
.
Similarly:
Hence the conclusion that these balls have the same momentum.
Explanation:
Given that,
Potential difference, V = 412 V
Magnitude of magnetic field, B = 188 mT
(a) The potential energy of electron is balanced by its kinetic energy as :
v is speed of the electron
(b) When the charged particle moves in magnetic field, it will move in circular path. The radius of the circular path is given by :
Hence, this is the required solution.