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A box (250 kg) sits inside the trailer of a semitruck traveling at a speed of 25 m/s (~ 55 mph). Suddenly, a car in front of the truck stops in the road. The driver of the truck hits the brakes to bring the truck to a stop. Assume that the coefficient of static friction µs = 0.7 between the box and the floor of the trailer. Assume g = 10 m/s2. When the truck slows down while traveling left, what is the direction of the friction force on box 1 (right, left, none)?

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Respuesta :

Answer:

RIGHT

Explanation:

given,

mass of box = 250 kg  

speed of the truck = 25 m/s

static friction  µs = 0.7      

g = 10 m/s²                

to find direction of friction on the box    

truck is moving in left direction and suddenly in front of truck a car stops then the driver hit the brake hard so at that moment the box on the trailer will have the tendency to move left so to oppose its movement friction force will be on RIGHT

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