physics need the formulas

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Question description

the kingda ka roller coaster in new jersey is the worlds tallest ride of its kind. as the passenger cars are launched from rest at the start they are accelerated uniformly to a speed of 57m/s(128 mph) in just 3.5s 

A) what is the acceleration in m/s^2? and in g's? 
B) if a passenger has a mass of 65kg, what is the force that acts on him during the launch phase of this ride in newtons? and in pounds?

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