Calculate the final speed of the 2.00-kg object that is pushed for d =25.0 m by the F-50.0 N forc frictionless floor (see the figure below). Assume the object starts from rest. at rest V = ? 2 kg $200 F - d 2 kg 1) Calculate the final speed. (Express your answer to two significant figures.) m S
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- answer Q 5A student releases a 3.9kg cart from the top of ramp and starts a stopwatch. The length from the front of the cart to the end of the ramp and the distance from the end of the ramp to the stopper are shown. Neglect backwards friction and drag and assume the cart does not lose speed transitioning from the ramp to the floor. What is the cart's acceleration on the ramp? unit | (magnitude) What is the cart's acceleration on the floor? 130cm unit (magnitude) How long does the cart take to reach the end of the ramp? 5° 200cm unit (timed from the release) How fast is the cart traveling as it hits the stopper? unit How long does the cart take to reach the stopper? unit (timed from the release) cannot be detern check answers challenge ne Calculator ound = 343m/s cant figures Rain to stop e here to search ACC t;3201. Boxing gloves are padded to lessen the force of a blow. The glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. Think & Prepare 1. Make note of what's given and what's unknown. Relate known quantities to symbols. 2. Draw a labeled sketch if possible. 3. Identify the physics principle and approach. Write down relevant equations symbolically. Simplify if possible. 4. Insert numerical quantities to solve for unknowns. 5. Does the answer make sense? (a) Calculate the change in kinetic energy of the glove and arm. Enter to 3 significant figures AKE= Note: AKE = KE final-KE initial (b) Where does this energy go? J into doing work against the force exerted by the face against the glove into doing work against gravity into the potential energy of the face O into the potential energy of the glove and arm (c) Calculate the force exerted on the boxing glove by the opponent's face. Consider the relative…
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