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Lee has a mass of 40.0 kg and ice skates with a speed of 4.6 m/s.
She collides into Mat 80.0 kg) who is standing still on the ice. They
move off together. What is their final speed in m/s

Sagot :

Asuwafohjamesidn

Their common speed is 1.53 m/s.

What is speed?

Speed can be defined as the ratio of the distance to the time of a body in motion.

  To calculate their final speed, we use the formula below.

Formula:

  • mu+m'u' = V(m+m')............. Equation 1

Where:

  • m = mass of the Lee
  • m' = mass of Mat
  • u = initial speed of Lee
  • u' = initial speed of Mat
  • V = Their common speed.

make V the subject of the equation

  • V = (mu+m'u')/(m+m')........... Equation 2

From the question,

Given:

  • m = 40 kg
  • m' = 80 kg
  • u = 4.6 m/s
  • u' = 0 m/s

Substitute these values into equation 2

  • V = [(40×4.6)+(80×0)]/(40+80)
  • V = 184/120
  • V = 1.53 m/s.

Hence, Their common speed is 1.53 m/s.

Learn more about speed here: https://brainly.com/question/3004254

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