An object of mass 8.0 kg moves with a uniform speed of 25 m/s. Calculate the force that must be applied to this object so that it comes to a halt in 10 seconds.

A rock falls under a gravitational force of 16.3 N on the moon. Given that the acceleration due to gravity on the moon is one sixth of that on the Earth, find the mass of the rock.

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answer is c

step-by-step explanation:

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0