AP Physics 1· difficulty 4/5
A 2.0 kg block sits on a horizontal cart. The cart accelerates to the right at , and the block does not slip. What is the magnitude and direction of static friction on the block?
8.0 N to the right
8.0 N to the left
19.6 N to the right
0 N (no friction needed)
Explanation
The block must accelerate with the cart, so net horizontal force on block is to the right. Static friction supplies this entirely.
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