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Magnitude of acceleration

  • Thread starter flower123
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  • #1
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Really desperate for some help with this, Thought i had i cracked and quite clearly i don't
Im very bad with explaining how i arrived at a answer as i make such a mess of my answers and some time just guess as i can't seem to figure it out! Please help
. What is the magnitude of the acceleration that this force will cause when applied to a car with a mass of 1.1x10³Kg

Then calculate the final speed of the car (above) assuming that it was standing still initially and that the force of 5.0 x 10³ N is applied for 6.0s

Why would the car take longer to reach the calculated speed if the car's mass was 1.4 x10³Kg. which part of newtons second law would explain this.

THANKS in advance .
 

Answers and Replies

  • #2
PhanthomJay
Science Advisor
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Say flower, why don't you write out the equation for Newton's 2nd law, and the kinematic motion equations, and play around with them for a few minutes, and see what you get. Please show your work and post your results. Then someone will check it for you and provide further assistance.
 
  • #3
115
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As my mechanics teacher always says - Write down what you know first.

Force (F) =
Time (t) =
Mass (m) =
Initial Speed (u) =

You know what all the above are, so fill them in.

Acceleration (a) =
Final Speed (v) =

What equations can you think of relating the 4 above quantities with the above 2 values? As Jay said, think suvat (the one without s as you don't know that) and Newton's 2nd law.
 

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