Question

A hockey puck is hit on a frozen lake and starts moving with a speed of 14.4 m/s. 3.0 seconds later, its speed is 7.3 m/s.
(a) What is its average acceleration?

Answer 1

A hockey puck is hit on a frozen lake and starts moving with a speed of 14.4 m/s. 3.0 seconds later, its speed is 7.3 m/s.
(c) How far does the puck travel during the time interval?

Answer 2

v=v₀+at
a= (v-v₀)/t
s= v₀t-at²/2