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Problem: Car 1 has 2 times the mass of car 2, but only 0.3 as much kinetic energy. What is the ratio between the speeds of the two cars (v1/v2)? You must type your answer as a numerical value.
Please explain how you came to your conclusion.
A mass of 5 kg rests on an incline plane which is tilted at an angle of 30 degrees (assume no friction). What is the acceleration down the incline
A 2 kg box is raised from rest a distance of 3 m by a vertical force of 110 N. Find the final kinetic energy of the box
Two equal-mass stars maintain a constant distance apart of 4.8E10 m and rotate about the point midway among them. They make one revolution every 2.6 yr. What is the mass (in kg) of each star?
A 120 kg scaffold is 6.6 meters long. It is hanging with two wires, one from each end. A 540 kg box sits 1 meter from the left end. What is the tension in the right hand side wire
A husband and wife take turns pulling their child in a wagon along a horizontal sidewalk. Each exerts a constant force and pulls the wagon through the same displacement. What is the magnitude of the pulling force exerted by his wife
A 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Two metallic blocks are placed in the water. Determine the specific heat of the unknown second sample
An old wooden tool is found to contain only 18% of 146C that a sample of fresh wood would. How old is the tool
The gap between the plates of a parallel plate capacitor is 6.9 mm. When the plates are charged with a 7.0 V battery, What is the magnitude of the electric field between the plates 3.45 mm from the negatively charged plate
A girl is sledding down a slope that is inclined at 30º with respect to the horizontal, The combined mass of the girl and the sled is 76.5 kg, How much time is required for the sled to travel down a 149-m slope, starting from rest
A ballistic pendelum of mass 1kg is struck by a 0.003kg bullet moving at 600 m/s. How high does the pendulum swing
A man pulls a block of mass m = 23 kg up an incline at a slow constant velocity for a distance of d = 5.5 m. The incline makes an angle q = 29° with the horizontal. The coefficient of kinetic friction between the block and the inclined plane is µk..
A small airplane flies in a flies in a straight line at a speed of 750 kilometer per hour. Find how many hours or minutes does it take the plane to fly 350 kilometer
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