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course Phy 121
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:
Fnet=M*a
Fnet=12kg*(3m/s^2)
Fnet=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:
Fnet=M*a
20N=4kg*a
5m/s^2=a
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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:
Because the object should be accelerating away from the object, so since it is moving toward the force there is another force overcoming the 20N and then some extra to send it accelerating toward the original force.
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What is the total of all those forces and in what direction does this total act?
answer/question/discussion:
Fnet=M*a
Fnet=10kg*1.5m/s^2
15N + 20N original force 35N total. There are 35 Newtons of force being applied against the original 20N, so there are 15N of net force acting towards the direction of the original force.
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&#This looks very good. Let me know if you have any questions. &#