A player strikes a hockey puck giving it a velocity of 48.83 m/s. The puck slides across
the ice for 0.198 s after which time its velocity
is 46.83 m/s.
The acceleration of gravity is 9.8 m/s
2
.
If the mass of the puck is 185 g, what is the
average drag force exerted on it by the ice?

What is the coefficient of kinetic friction for
the puck sliding on ice?

If the puck strikes the goalie’s pads and stops
in a distance of 3.57 cm, what average force is
exerted on the pads?
Answer in units of N.

0.55x745.7j and a calculator

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

= initial pressure

= final pressure = 2

= initial volume

= final volume = /4

= initial temperature = 20 c = 20 + 273 = 293 k

= final temperature = ?

using the equation