A hockey puck moves on smooth ice with a constant velocity of 2.5 m/s. How far d

Question

A hockey puck moves on smooth ice with a constant velocity of 2.5 m/s. How far does it move in 5.0s? Show your work. Distance traveled in 5.0s = ___________ The hockey puck, still moving at 2.5 m/s, suddenly encounters a rough patch on the ice and is brought to a rest in 1.5 s. What is its acceleration while in contact with the rough patch? Assume uniform acceleration. acceleration = ___________ What is the stopping distance for the hockey puck, i.e. how far did it move on the rough patch as it was stopping? Yes, assume uniform acceleration. Stopping distance = __________

Explanation / Answer

here,

11)

the initial speed , u = 2.5 m/s

time taken to stop , t = 1.5 s

accelration , a = - 1.67 m/s^2

the stopping disatnce , s = - u^2/(2a)

s = - 2.5^2 /( - 2 * 1.67)

s = 1.85 m

the stopping distance is 1.85 m

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