A50kg football player heading to the right at 2.5 m/s
collides with and tackles a 40kg player heading left at 3.5
m/s toward him. what is the speed and direction of the
tangled players?

The speed of the tangled players is in left direction

Explanation:

Mass of Player 1 = =

Mass of Player 2 = =

Velocity of Player 1 moving right =

Velocity of Player 2 moving left =

By law of conservation of momentum:

Here represents the velocity of tangled players.

Plugging in values in the equation.

Dividing both sides by 90.

∴

The negative velocity indicates that the tangled players move to the left after collision.

The speed of the tangled players is in left direction

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask