Three boys are standing on a horizontal platform of mass 170kg as shown in figure. The exchange their position as shown inthe figure. Distance moved by the platform is:

In the figure shown, when the persons A and B exchange their positions, then the distance moved by the plank is _____.

A solid block of mass m = 1 kg is reasting on a horizontal platform as shown in figure. The z direction is vertically up. Coefficient of friction between the block and the paltform is mu = 0.2 . The platform is moved with a time dependent velocity given vec(V) = (2that(i) + that(j) + 3hatk) m//s . Then the magnitude of the net force exerted by the block on the platform is : (Take g = 10 m//s^(2) )

In the figure shown, when the persons A and B exchange their positions, then the distance moved by B with respect to ground is ____________.

Two persons, A of mass 60 kg and B of mass 40 kg , are standing on a horizontal platform of mass 50 kg . The platform is supported on wheels on a horizontal frictionless surface and is initially at rest. Consider the following situations. (i) Both A and B jump from the platform simultaneously and in the same horizontal direction. (ii) A jumps first in a horizontal direction and after a few seconds B also jumps in the same direction. In both the situations above, just after the jump, the person ( A or B ) moves away from the platform with a speed of 3 m//s relative to the platform and along the horizontal. Final speed of the platform in situation (i), i.e., just after both A and B have jumped will be a.

Two persons, A of mass 60 kg and B of mass 40 kg , are standing on a horizontal platform of mass 50 kg . The platform is supported on wheels on a horizontal frictionless surface and is initially at rest. Consider the following situations. (i) Both A and B jump from the platform simultaneously and in the same horizontal direction. (ii) A jumps first in a horizontal direction and after a few seconds B also jumps in the same direction. In both the situations above, just after the jump, the person ( A or B ) moves away from the platform with a speed of 3 m//s relative to the platform and along the horizontal. Final speed of the platform in situation (ii), i.e., just after B has jumped, will be nearly

Two persons, A of mass 60 kg and B of mass 40 kg , are standing on a horizontal platform of mass 50 kg . The platform is supported on wheels on a horizontal frictionless surface and is initially at rest. Consider the following situations. (i) Both A and B jump from the platform simultaneously and in the same horizontal direction. (ii) A jumps first in a horizontal direction and after a few seconds B also jumps in the same direction. In both the situations above, just after the jump, the person ( A or B ) moves away from the platform with a speed of 3 m//s relative to the platform and along the horizontal. In situation (i), just after both A and B jump from the platform, velocity of centre of mass of the system ( A, B and the platform) is

Two persons, A of mass 60 kg and B of mass 40 kg , are standing on a horizontal platform of mass 50 kg . The platform is supported on wheels on a horizontal frictionless surface and is initially at rest. Consider the following situations. (i) Both A and B jump from the platform simultaneously and in the same horizontal direction. (ii) A jumps first in a horizontal direction and after a few seconds B also jumps in the same direction. In both the situations above, just after the jump, the person ( A or B ) moves away from the platform with a speed of 3 m//s relative to the platform and along the horizontal. In situation (i), just after both A and B jump from the platform, velocity of centre of mass of the system ( A, B and the platform) is

Two particle of mass 4 kg & 2kg are located as shown in figure then find out the position of centre of mass.

Find the position of centre of mass of the section shown in figure