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A snowmobile travels in a straight line.The snow-mobile’s initial velocity is +3.0 m/s.
a.
If the snowmobile accelerates at a rate of +0.50m/s2for 7.0s, what is its final velocity? b.
If the snowmobile accelerates at the rate of−0.60m/s2from its initial velocity of+3.0 m/s, how long will it take to reach a complete stop?

Respuesta :

musiclover10045

A) 7 x 0.5 = 3.5 +3.0 = 6.5 m/s

B) 3/.6 = 5, it will take 5 seconds to stop

twvogels
[tex]v_{f}=v_{i}+at[/tex]
[tex]v_{f}=3.0m/s+(0.50m/s^{2})(7.0s)[/tex]
[tex]v_{f}=3+3.5=6.5m/s[/tex]

[tex]v_{f}=v_{i}+at[/tex]
[tex]t=\frac{v_{f}-v_{i}}{a}[/tex]
[tex]t=\frac{0-3}{-0.6}[/tex]
[tex]t=5sec[/tex]

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