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A father pushes his child on a swing so that the child's speed is 9.00 m/s at the lowest point of his path. The swing is suspended 2.00 m above the child (i.e., assume that's the length of the swing).
(a) What is the centripetal acceleration of the child at the low point of the swing?
(b) What force does the child exert on the seat if his mass is 18.0 kg?
(c) What is unreasonable about these results?
(d) Which premises are unreasonable or inconsistent?
A wheel is mounted on a stationary axle which we can assume frictionless. As a result, the wheel can turn freely but cannot translate. How much work is done by you on the pulling
Consider a 1.0 g sample of carbon with 14C / 12C of 1.3 x 10-12. What is the activity of the sample
A 2.20 kg object is suspended from a spring with k = 18.00 N/m. The mass is pulled 0.35 m downward from its equilibrium position and allowed to oscillate. What is the highest kinetic energy of object.
Upton Chuck is riding the Giant Drop at Great America. If Upton free falls for 2.6 seconds, what will be his final velocity and how far will he fall
Water runs out of the horizontal drainpipe at the rate of 120 liters per minute. It falls 3.20 m to the ground. Assume the water doesn't splash up, what average force does it exert on the ground? (1 liter = 1 kg.)
find the combined mass of the dog and basket. chandelier with mass is attached to the ceiling of a large concert hall by two cables.
assume the current in the coaxial cable, see the figure , is not uniformly distributed, but instead the current density varies linearly with distance from the center: for the inner conductor and for the outer conductor. Each conductor still carrie..
A car in stop-and-go traffic starts at rest, moves forward 19 in 8.0 , then comes to rest again. The velocity-versus-time plot for this car is given in the figure. What distance does the car cover in the first 4.0 seconds of it motion?
Fluids are examined.1) Part A- a raft floats and displaces 4.5 m^3 of water. The volume of the raft id 8 m^3 and its area is 10 m^2. When the tide is low the raft is attached to an anchor
A 1055-kg van, stopped at a traffic light, is hit directly in the rear by a 790-kg car traveling with a velocity of +2.40 m/s. What is the final velocity of each vehicle
How far from the dog will the suitcase land. A car accelerates uniformly (a = constant) from 34 meters/second up to 84 meters/second in 3.7 seconds. What is the acceleration of car in meters/second2.
A 7.5 nC charge is located 1.8m from a 4.2 nC charge. Find out the magnitude of the electrostatic force that one charge exerts on the other. Is the force attractive or repulsive.
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