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A sky diver of mass 81.0 kg jumps from a slow-moving aircraft and reaches a terminal speed of 51.5 m/s.
(a) What is the acceleration of the sky diver when her speed is 30.0 m/s?
What is the drag force on the diver when her speed is the following?
(b) 51.5 m/s _____ N
(c) 30.0 m/s _____ N
A 55 g piece of aluminum at 21 °C is cooled to -196 °C by placing it in a large container of liquid nitrogen at that temperature. How much nitrogen is vaporized
Two ropes support a load of 253 kg. The two ropes are perpendicular to each other, Find the tension in the second rope
The 50 cm tall object(arrow) is located 75 cm away from the diverging lens plane ( focal length 50 cm). Calculate the distance to the image of the object
A 2 kg ball moving towards the West with a speed of 10m/s collides with a 4 kg ball moving towards the North with a speed of 3m/s. Find the velocity of the combination after collision
A 6.00 V storage battery is connected to three resistors, 7.00 ?, 15.0 ?, and 20.0 ?, respec- tively. The resistors are joined in series. What is the current in the circuit
A car drives horizontally off a 86m -high cliff at a speed of 29m/s . Ignore air resistance. How long will it take the car to hit the ground
A car accelerates uniformly from rest and covers a distance of 71 m in 5.6 s. If the diameter of a tire is 42 cm, Find total number of rotations of the wheel
A 33.6 m length of copper wire at 23?C has aradius of 0.19 mm . The resistivity of copperis 1.7 × 10?8 ? m, determine the current in the wire
A golf ball of mass 0.045 kg is hit off the tee at a speed of 32m/s . The golf club was in contact with the ball for 3.10×10?3s. Find the impulse imparted to the golf ball
A place-kicker must kick a football from a point 36.0 m (about 40 yards) from the goal. By how much does the ball clear or fall short (vertically) of clearing the crossbar
A cat is being chased by a dog. Both are running in a straight line at constant speeds. How fast did the cat run
A person of mass 80 kg stands at the center of a rotating merry-go-round platform of radius 2.7 m, find the angular velocity when the person reaches the edge
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