Question

A hockey puck sliding on a frozen lake comes

to rest after traveling 176 m.
If its initial velocity is 2.3 m/s, what is its
acceleration

Answer 1

Given parameters:

Distance traveled = 176m

Initial velocity = 2.3m/s

Unknown:

Acceleration = ?

Solution:

Acceleration is the change in velocity with time. To solve this problem, we apply one of the motion equations;

V² = U² + 2as

where V is the final velocity

U is the initial velocity

a is the acceleration

s is the distance

final velocity is 0;

0² = 2.3² + 2 x a x 176

-5.29 = 352a

a = -
`(5.29)/(352)` = - 0.015m/s²