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A young girl gives her toboggan a push of 4.0 m/s up a hill. It slides up the hill slowing down at an acceleration of 8.0 m/s^2 [down]. It comes to a stop and then slides back towards her speeding up at the same rate as it slowed down on the way up. If the girl has to run 48 m down the hill from where it first was pushed to get to where her sled stopped, find the elapsed time for the journey.
A 5.0 V battery storing 43.0 kJ of energy supplies 1.5 A of current to a circuit. How much energy does the battery have left after powering the circuit for 1.0 hour
the angle between 2 electrons is 65 degrees. if two electrons are each 2.10times10-10 m from a proton find the
a ball is thrown straight up and rises to a maximum height of 22 m. at what height is the speed of the ball equal to
A disk with mass m = 6.0 kg and radius R = 0.41 m hangs from a rope attached to the ceiling. The disk spins on its axis at a distance r = 1.26 m from the rope and at a frequency f = 18.0 rev/s (with a direction shown by the arrow). 1) What is the mag..
a 21 nf capacitor is connected across an ac generator that produces a peak voltage of 4.8 v.a at what frequency is the
An object 2.0 cm high is placed 45 cm from a concave mirror of radius 10 cm and radius of curvature 60 cm. Find the location, size, and orientation of the image
Gas in a container is at a pressure of 2.4 atm and a volume of 3.8m3. what is the work done on the gas if it expands at constant pressure to twice its initial volume?
A hot-air balloon is rising upward with a constant speed of 3.87m/s. When the balloon is 9.27 m above the ground, the balloonistaccidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?
A ball bearing is released from a height of 1m to a metal plate. Explain how you would determine the fractional loss in kinetic energy of the ball bearing after it hits the plate. What happens to the kinetic energy lost?
A 840-kg drag race car acceleratesfrom rest to 105 km/h in 0.80 seconds. What is the change in momentum of the car
A 40g ball of clay traveling east at 2.0m/s collides and sticks together with a 60g ball of clay traveling north at 1.0m/s
A mass of 200 grams stretches a spring 5 cm. The mass is the set in motion from its equilibrium position with an initial downward velocity of 20 cm/sec. assuming that there is no damping, decide the position of the mass at any time t, and decide the ..
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