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2014-09-05T06:31:34+05:30

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The horizontal floor has a frictional force F that inhibits the movement of the cart.

Acceleration of cart = P - F = 0 as the cart moves with constant velocity and acceleration is 0
                   So F = P

When a force of 1.2 P acts on the cart, acceleration a of the cart is
                1.2 P - F = m a
               1.2 P - P = 20kg * 0.05 m/sec²

                P = 1/0.2 = 5 Newtons

2 5 2
what does it mean "1.2P - F = m a"?
net force or resultant of forces 1.2P and Frictional force, causes an acceleration a in the cart.
are u 11th class manish?