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course PHY 201
10/07 8:13pm
Answer the following based on Newton's Second Law:·How much net force is required to accelerate a 12 kg mass at 3 m/s^2?
answer/question/discussion:
F=ma
F=12kg*3m/s^2
F=36kg/m/s^2
F=36N
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· What would be the acceleration of a 4 kg mass subject to a net force of 20 Newtons?
answer/question/discussion:
F=ma
20N=4kg*a
a=20N/4kg
a=20kg/m/s^2/4kg
a=5m/s^2
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· If you exert a force of 20 Newtons on a 10-kg object and it accelerates in the direction of your force at 1.5 m/s^2, then how do you know there are other forces acting on the object besides your own?
answer/question/discussion:
F=ma
20N=10kg*a
According to Newton’s 2nd law, then the acceleration should be 2m/s^2. Since the actual acceleration was 1.5m/s^2, then .5m/s^2 was lost to other forces.
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· What is the total of all those forces and in what direction does this total act?
answer/question/discussion:
The total of the forces acting on the object was .5m/s^2. They were acting in the opposite direction of the initial force.
Right idea, but you are giving accelerations, not forces.
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You can ignore the request for a revision, but the discussion at the link below would be worth a look:
&#See any notes I might have inserted into your document, and before looking at the link below see if you can modify your solutions. If there are no notes, this does not mean that your solution is completely correct.
Then please compare your old and new solutions with the expanded discussion at the link
Solution
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