A skier starting from rest skis straight down a slope 50 meters long in 5.0 seconds. What is the magnitude of the acceleration.

ok so i know the answer is " 4 m/s^2

but can anyone show me how to get this answer showing work?

Question

A skier starting from rest skis straight down a slope 50 meters long in 5.0 seconds. What is the magnitude of the acceleration.

ok so i know the answer is " 4 m/s^2

but can anyone show me how to get this answer showing work?

ash2326 · Answer

Skier starts from rest so its inital velocity is 0
u=0 m/s
The distance it covers is 50 m 
S=50 m
Time it takes 5 seconds
T=5
We have the formula
$$S=ut+\frac 12 at^2$$
Let's plugin the values of S , u and t
$$50=0+\frac 12 a\times(5)^2$$
or
$$\frac 1 2 a \times 5^2=50$$

Can you solve for a or acceleration from here?

anonymous · Answer

oohhh i get it now thankss !