Question

A hockey puck slides across the ice with an initial velocity of 7.3 m/s .It has a decleration of 1.1 m/s and is traveling towards the goal 5.0 m away .How much time does the goalie have to stop the puck?

Answer 1

t = 6.63 s

Step-by-step explanation:

Given that,

Initial velocity of the puck, u = 7.3 m/s

Deacceleration of the puck, a = -1.1 m/s²

Distance traveled, d = 5 m

We need to find the time the goalie have to stop the puck. Using equation of motion.

v = u +at

v = 0 (stops)

So,

`u=-at\\\\t=(u)/(-a)\\\\t=(7.3)/(-(-1.1))\\\\t=6.63\ s`

So, the required time is 6.63 seconds.