2. Two football players are running directly towards each other. They have diffe

Question

2. Two football players are running directly towards each other. They have different (but similar) masses and also different (but similar) initial speeds. They collide and, for a moment, "stick together" as the tackle is made. Answer the following questions about the collision (Gjust before and just after the tackle) as always true/false or possibly true: True Possibly False True Possibly False True Possibly False h player experiences a net force during the tackle of the same magnitude Their total momentum before the tackle is zero Their total momentum after the tackle is zero Their total momentum before and after the tackle is the same Their total kinetic energy before the tackle is zero Their total kinetic energy ofter the tackle is zero Kinetic energy is conserved in the collision True Possibly False True Possibly False True Possibly False True Possibly False

Explanation / Answer

2)

i) according to newton's third law

the force exerted by them on each other is equal and oposite

hence, this is TRUE

ii)

NO, the total momentum posisibly by zero

it is the vector sum of both the momenta

iii)
NO, the total momentum posisibly by zero

it is the vector sum of both the momenta and equal to totol momentum before collision

iv)

as there is no external force ,

total momentum will remain same

this is TRUE

v)

False , the kinetic energy is never zero or negative for a moving object

vi)

Possibly , if they come to rest after collision

vi) as this is not a elastic collision

False, kinetic energy is not conserved

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