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2015-10-10T12:03:08+05:30

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Mass = 20kg
friction = P
force = 1.2 P
a = 0.05 m/s^2

1.2P - P = 20 * 0.05
0.2P = 1
P = 1/0.2
P = 5N
3 3 3
explanation would be helpful to readers
2015-10-10T23:59:46+05:30

This Is a Certified Answer

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
When force P acts and the cart travels with uniform velocity (0 acceleration), it means that force P cancels the Friction force acting in the opposite direction.

  net force on cart = mass * acceleration
   1.2 P - friction = mass * acceleration
     1.2 P - P = 20 kg * 0.05 m/sec/sec
       0.20 P = 1  Newton

           P = 5 Newtons

1 5 1