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You accelerate your car forward. What is...

You accelerate your car forward. What is the direction of the frictional force on a package resting on the floor of the car ?

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The package in the accelerated car (a non inertial frame) experiences a Pseudo force in a direction opposite to that of the motion of the car. The frictional force on the package which acts opposite to this pseudo force is thus in the same direction (forward) as that of the car.
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CBSE COMPLEMENTARY MATERIAL-NEWTON'S LAWS OF MOTION-Laws Of Motion
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