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On an icy road, a 1600 kg car moving at 53 km/h strikes a 470 kg truck moving in the same direction at 27km/h . The pair is soon hit from behind by a 2100 kg car speeding at 55 km/h , and all three vehicles stick together. Find the speed of the wreckage.
An artificial satellite is moving in a circular orbit with a speed of 6.3 km/s and a period of 84.0 min. What is the acute angle between the radius vector and the total acceleration of the satellite
Consider the Earth and a cloud layer 900 m above the planet to be the plates of a parallel-plate capacitor. (a) If the cloud layer has an area of 1.0 km2 = 1000000 m2, what is the capacitance?
A person holds a 1.42-N baseball in his hand, a distance of 34.0cm from the elbow joint, Calculate the net torque acting on the forearm and hand
A scuba diver and her gear displace a volume of 69.7L and have a total mass of 72.9kg. What is the buoyant force on the diver in sea water
Soles of boots that are designed to protect workers from electric shock are rated to pass a maximum rms current of 1.5mA, What is the minimum allowed resistance of the sole
A swimmer heads directly across a river, swimming at 1.9 m/s relative to the water. She arrives at a point 34 m downstream from point directly across the river, which is 80 m wide.
A pendulum of length 7.87 m is released from rest at an angle of 22.4 º from the vertical. What is the maximum speed of the pendulum
A tennis ball of mass 57 g travels with velocity m/s toward a wall. After bouncing off the wall, What is the change in the momentum of the tennis ball
A postal worker pushes a 160 N bag of mail up a 31 degree ramp at a constant velocity. The ramp exerts a frictional force of 30 N on the bag. What is the magnitude of the worker's push
A 2.2×10^4kg rocket has a rocket motor that generates 3.1×10^5N of thrust. What is the rocket's initial upward acceleration
An object-spring system oscillates with an amplitude of 4.2 cm. If the spring constant is 270 N/m and object has a mass of 0.50 kg, calculate the maximum acceleration of the object
Certain stars at the end of their lives are thought to collapse combining their protons and electrons together to form a neutron star. Such a star could be thought of as a giant atomic nucleus.
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