Question

A snowmobile has an initial velocity of 3.0 m/s

Part 1: If it accelerates at the rate of 0.5 m/s/s for 7.0 sec, what is the final vel.?
Part 2: If it accelerates at the rate of -0.60m/s/s, how long will it take to reach a complete stop?

Answer 1

Part a)

`v_f = 6.5 m/s`

Part b)

`t = 5 seconds`

Step-by-step explanation:

Part a)

As we know that

`v_f = v_i + at`

here we know that

`v_i = 3 m/s`

`a = 0.5 m/s^2`

`t = 7.0 s`

so we will have

`v_f = 3 + (0.5)(7.0)`

`v_f = 6.5 m/s`

Part b)

if finally the snowmobile comes to rest

So here we can say that

`v_f = 0`

`v_i = 3.0 m/s`

`a = -0.60 m/s^2`

so now we have

`v_f = v_i + at`

`0 = 3.0 - (0.60)t`

`t = 5 s`

Answer 2

My answer to the problem is as follows:

1. Use the kinematic formula

Vf = Vi + a*t

for a, Vi = 3.0 m/s, a = 0.5 m/s/s, and t = 7.o s.

for b, Vf = 0, Vi = 3.0 m/s, and a = -0.60 m/s/s.

I hope my answer has come to your help. God bless and have a nice day ahead!