Question

Two persons, A of mass 80 kg and B of mass 50 kg are standing on a stationary hond
mass 20 kg. The platform is supported on wheels on a horizontal frictionless surface and is m
mass 30 kg are standing on a stationary horizontal platform of
any
Consider the following situations
(1) Both A and B jump from the platform simultaneously and in the
same horizontal direction
(U) A jumps first in horizontal direction and after a few seconds B
also jumps in the same direction
In all the two situations above, just after the jump, any person (A
or B) move away from the platform with a speed 5 m/s relative
to the platform and along the horizontal,
In situation (1) just after both A and B jump from the platform, velocity of centre of mass of the
system (A, B and the platform) is
2
Final speed of the platform in situation (i), ie, just after both A and B have jumped will be nearly
3.
Final speed of the platform in situation (ii), i.e., just after B has jumped, will be nearly​

Answer 1

Answer:

Answer (1) 4.33 m/s and (2) 6.64 m/s

Explanation:

According to the problem the mass of A and B is given , both of them are standing on a base having the mass of 20 kg

Since there is no horizontal force is acting on the platform therefore the velocity of center of mass will be zero as well as acceleration is also be zero

Therefore for both the situations the linear velocity is conserved

Now by conservation of momentum, 20 x = 130(5-x) => x = 4.33 m/s (Answer for the 1st part)

Let p the velocity when A jumped from the platform

now from conservation of linear momentum,

70p = 80(5-p)

=> p = 3.07 m/s

Now when B jumped,

70 x 3.07 = 20 y - ( 50(5-y))

=> y = 6.64 m/s

Answer 2

Answer:

Explanation:In physics, the Coriolis force is an inertial or fictitious force that acts on objects that are in motion within a frame of reference that rotates with respect to an inertial frame. ... Newton's laws of motion describe the motion of an object in an inertial (non-accelerating) frame of reference.

In physics, the Coriolis force is an inertial or fictitious force that acts on objects that are in motion within a frame of reference that rotates with respect to an inertial frame. ... Newton's laws of motion describe the motion of an object in an inertial (non-accelerating) frame of reference.