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When a clock reads 4.0 seconds a cart's velocity in the positive x direction is 6.0 m/s. when the clock reads 7.0 seconds, the cart's velocity in the positive x direction is 7.0 m/s. what is the magni
When a clock reads 4.0 seconds a cart's velocity in the positive x direction is 6.0 m/s. when the clock reads 7.0 seconds, the cart's velocity in the positive x direction is 7.0 m/s. what is the magnitude (in m/s2) of the average acceleration of the cart?