Two rollerbladers face each other and stand at rest on a flat parking lot. tracey has a mass of 32 kg, and jonas has a mass of 45 kg. when they push off against one another, jonas acquires a speed of 0.50 m/s.

Question

Physics

Averie Fleming

27 August, 12:03

Two rollerbladers face each other and stand at rest on a flat parking lot. tracey has a mass of 32 kg, and jonas has a mass of 45 kg. when they push off against one another, jonas acquires a speed of 0.50 m/s.

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Ronnie Bauer · Answer 1

Momentum is a product of mass and the velocity of a body. The initial momentum is always equal to the final momentum during collisions between two bodies.

Therefore; M1U1 + M2U2 = M1V1 + M2V2, where m1 is the mass of tracey and m2 is the mass of jonas, while u is the initial velocity and v is the final velocity.

(32 * 0) + (45*0) = (32 * v1) + (45 * 0.50)

0 = 32V1 + 22.5

32 V1 = - 22.5

V1 = - 0.703 (negative indicates difference in direction)

There, Tracey's speed will be 0.703 m/s