Which of the following statements are true for magnetic force acting on a current-carrying wire in a uniform magnetic field? Che
1 answer:
You might be interested in
There are some information missing on Part D: Let the mass of object 1 be m and the mass of object 2 be 3m. If the collision is perfectly inelastic, what are the velocities of the two objects after the collision? Give the velocity v_1 of object one, followed by object v_2 of object two, separated by a comma. Express each velocity in terms of v.
Answer: Part A: v_1 = 0; v_2 = v
Part B: v_1 = v_2 =
Part C: v_1 = ; v_2 =
Part D: v_1 = v_2 =
Explanation: In elastic collisions, there no loss of kinetic energy and momentum is conserved. Momentum is determined as p = m.v and kinetic energy as K = m.
Conserved means that the amount of initial momentum is equal to the amount of final momentum:
.
+
.
=
No loss of energy means that initial kinietc energy is the same as the final kinetic energy:
To determine the final velocities of each object, there are 2 variables and two equations, so working those equations, the result is:
For all the collisions, object 2 is static, i.e. = 0
<u>Part A</u>: Both objects have the same mass (m), = v and collision is elastic:
v_1 =
v_1 = 0
v_2 =
v_2 =
v_2 = v
When the masses are the same and there is an object at rest, the object in movement stops and the object at rest has the same same velocity as the object who hit it.
<u>Part B</u>: Same mass but collision is inelastic: An inelastic collision means that after it happens, the two objects has the same final velocity, then:
.
+
.
=
v_1 = v_2 =
v_1 = v_2 =
<u>Part C:</u> Object 1 is 2m, object 2 is m and elastic collision:
v_1 =
v_1 =
v_1 =
v_2 =
v_2 =
v_2 =
<u>Part D</u>: Object 1 is m, object is 3m and collision is inelastic:
v_1 = v_2 =
v_1 = v_2 =
v_1 = v_2 =
Explanation:
It is given that,
Mass of an electron,
Initial speed of the electron,
Final speed of the electron,
Distance, d = 5 cm = 0.05 m
(a) The acceleration of the electron is calculated using the third equation of motion as :
Force exerted on the electron is given by :
(b) Let W is the weight of the electron. It can be calculated as :
Comparison,
Hence, this is the required solution.
Answer:
52.49 Kg
Explanation:
Let m1 and v1 denote your mass and velocity respectively
Let m2 and v2 denote your friends mass and velocity respectively
Kinetic energy is given by
Since your kinetic energies are the same hence
and making m2 the subject then
Since v2 is v1+0.28v1=1.28v1
Substituting m1 for 86 Kg