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BAED-PHYC2121 General Physics 1
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Lonnie pitches a baseball of mass 0.20 kg. The ball arrives at home plate with a speed of 35 m/s and is batted straight back to Lonnie with a return speed of 65 m/s. If the bat is in contact with the ball for 0.055 s, what is the impulse experienced by the ball?
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A 180-hp engine can deliver, in SI units, an average power of ____. (1 hp = 746 W)
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A ceiling fan is turned on and reaches an angular speed of 120 rev/min in 20 s. It is then turned off and coasts to a stop in an additional 40 s. The ratio of the average angular acceleration for the first 20 s to that for the last 40 s is which of the following?
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A 1.00-kg duck is flying overhead at 1.50 m/s when a hunter fires straight up. The 0.0100-kg bullet is moving 200 m/s when it hits the duck and stays lodged in the duck's body. What is the speed of the duck and bullet immediately after the hit?0%
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I drop a 60-g golf ball from 2.0 m high. It rebounds to 1.0 m. How much energy is lost?
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A simple pendulum, 1.00 m in length, is released from rest when the support string is at an angle of 20.0° from the vertical. What is the speed of the suspended mass at the bottom of the swing? (g = 9.80 m/s2 and ignore air resistance)
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6.3 Potential Energy
A simple pendulum, 2.00 m in length, is released from rest when the support string is at an angle of 35.0° from the vertical. What is the speed of the suspended mass at the bottom of the swing? (g = 9.80 m/s2 and ignore air resistance)0%
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6.3 Potential Energy
A baseball catcher puts on an exhibition by catching a 0.15-kg ball dropped from a helicopter at a height of 91 m. What is the speed of the ball just before it hits the catcher's glove 1.0 m above the ground? (g = 9.8 m/s2 and ignore air resistance)0%
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A bucket in an old well is hoisted upward by a rope which winds up on a cylinder having a radius of 0.050 m. How many rev/s must the cylinder turn if the bucket is raised at a speed of 0.15 m/s?
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A rock is thrown straight up with an initial velocity of 14 m/s. Ignore energy lost to air friction. How high will the rock rise?
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