contestada

Gloria pushes a full shopping cart with a force of 16 N. The cart has a mass of 19 kg. As Gloria pushed on the cart, she increased its velocity by 8.0 m/s. For how long did Gloria apply the force to the shopping cart?

Respuesta :

AL2006

       Force on the cart  =  (cart's mass) x (cart's acceleration)

                           16 N  =  (19 kg)          x      (acceleration)

       Acceleration of the cart  =  16 N / 19 kg  =   0.842 m/s²

How many seconds did it have to accelerate at the rate of  0.842 m/s²
in order to increase its speed by 8 m/s ?   

         (8 m/s)  /  (0.842 m/s²)  =   9.5 seconds

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