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2 years ago

Lee has a mass of 40.0 kg and ice skates with a speed of 4.6 m/s.

Physics

1 answer:

faltersainse [42]2 years ago

6 0

Their common speed is 1.53 m/s.

<h3>What is speed?</h3>

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: brainly.com/question/3004254

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