What average force was exerted on the ball
After falling from rest from a height of 29 m, a 0.47 kg ball rebounds upward, reaching a height of 19 m. If the contact between ball and ground lasted 2.5 ms, what average force was exerted on the ball?
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A 9.1 kg board is wedged into a corner and held by a spring at a 50.0° angle, as the drawing shows. The spring has a spring constant of 196 N/m and is parallel to the floor. Find the amount by which the spring is stretched from its unstrained
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What is the beat frequency when a 488 Hz tuning fork and a 498 Hz tuning fo
Two seconds later the bicyclist hops on his bike and accelerates at 2.6 m/s^{2} until he catches his friend. How much time does it take until he catches his friend (after his friend passes him)?
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A 5.80 cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.63 T pointing up. During the course of 0.15 s, the field is changed to one of 0.25 T pointing down. What is the average induced emf in t
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