A student sets a block onto a rough surface and pulls the block with a constant force F directed at an angle 0 above the horizontal. The student performs several trials in which the angle O is varied, but the force F is kept constant. The acceleration is measured in each trial, and the a vs 0 shown results. The graph shows that the box only accelerates for angles between 15° and 55°, and that there is a gap in the data points when the acceleration changes from zero to non-zero values. Explain why the box does not accelerate when the angle is too small or too large, and explain the gap in the data.
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- Subject: physicsIn the figure here, a box of Cheerios (mass mc = 1.70 kg) and a box of Wheaties (mass mw = 2.60 kg) are accelerated across a horizontal surface by a horizontal force applied to the Cheerios box. The magnitude of the frictional force on the Cheerios box is 2.10 N, and the magnitude of the frictional force on the Wheaties box is 4.60 N. If the magnitude of F is 12.7 N, what is the magnitude of the force on the Wheaties box from the Cheerios box? Number i UnitB In the figure, block A has a mass of 9.06 kg. It rests on a smooth (assume frictionless) horizontal table and is connected by a very light horizontal string over an ideal pulley to block B, which has a mass of 2.80 kg. When block B is gently released from rest, how long does it take block B to travel 76.7 cm? Report your answer in seconds.
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