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A 5,100-kg truck runs into the rear of a 1,000-kg car that was stationary. The truck and car are locked together after the collision and move with speed 2 m/s. What was the speed of the truck before the collision?
Starting from rest, a 98 kg firefighter slides down a fire pole. The average frictional force exerted on him by the pole has a magnitude of 800N, and his speed at the bottom of the pole is 3.2 m/s. How far did he slide down the pole.
two charged particles, Q1=+4.60 nC and Q2=-2.50 nC, are separated by 32.0 cm. What is the eletrical potential energy of the pair
A 54.0kg skateboarder wants to just make it to the upper edge of a "quarter pipe," a track that is one-quarter of a circle with a radius of 3.90m
A spring with spring constant k = 430 N/m is initially compressed x = 1.60 cm. How much work is done by the spring during this process
a ball made of rubber weighing 1kg is thrown at a wall at 6m/s. A ball of putty weighing 1kg is also thrown at the wall at a speed of 6m/s. Which ball transfers the greater momentum to the wall
A gallon of gasoline contains about 1.3x10^8 joules of energy. A 2000-kg car traveling 20 m/s skids to a stop. Estimate how much gasoline it will take to bring the car back to the original speed
Calculate the magnetic fields due to the displacement current midway between the plates at a radius equal to half the plate radius
What is momentum of the block
What is the coefficient of static between crate and incline
You have a 1200W microwave. When you put a cup of water in for 8 minutes only half evaporates. How eficient is your microwave
A box stands against the wall of a cylinder that is rotating. The cylinder has a radius of 30cm. What is the minimum consant speed (magnitude of linear velocity) the box must move so it doesn't slip
You place a 4.47-mm-high diamond on the axis of and 11.3 cm from a lens with focal length -6.79 cm. How high is the image
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