Two ice skaters are holding hands at the center of a frozen pond when an argumen

Question

Two ice skaters are holding hands at the center of a frozen pond when an argument ensues. Skater A shoves skater B along a horizontal direction.

(a) Identify the horizontal forces acting on A.

normal force of iceskater B's momentumforce from skater Bskater A's inertiagravity

(b) Identify the horizontal forces acting on B.

force from skater Anormal force of iceskater A's momentumgravityskater B's inertia

(c) Which force is greater, the force on A or the force on B?

the force on Athe force on B    the forces are the same sizewe need to know the skaters' masses

(d) Can conservation of momentum be used for the system of A and B?

YesNo    

Defend your answer.

This answer has not been graded yet.

(e) If A has a mass of 0.640 times that of B, and B begins to move away with a speed of 2.00 m/s, find the speed of A.
m/s

Explanation / Answer

(a)

momentumforce from skater Bskater

(b)

momentumforce from skater Askater

(c)

the forces are the same size

(d)

YES the conservation of momentum holds for all collision

(e)

PA = PB

mA*vA = mB*vB

0.64*mB*vA = mB*2

vA = 3.125 m/s

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.