Question

an ice skater is moving at a speed of 2 mi/hr when she slams into a wall 0.05 hours later. what is her acceleration?

Answer 1

`v_(f) = v_(0)+at`
at
`v_(f)=0`

`v_(0)=at`

`-2=0.05a`

`a= (-2)/(0.05) =-40mi/hr`

Hope this helps.

Answer 2

0.00497m/s²

Step-by-step explanation:

Acceleration is defined as the change in velocity of a body with respect to time. Mathematically,

Acceleration = change in velocity/time

Given velocity = 2miles/hour

Converting mi/hr to m/s,

1mi/hr = 0.447m/s

2mi/hr = 2×0.447

= 0.894m/s

Time taken to slam into a wall = 0.05hours

Converting this to seconds will give;

0.05×60×60

= 180seconds

Acceleration = 0.894/180

Acceleration = 0.00497m/s²