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A military gun is mounted on a railroad car (m = 1419 kg) as shown in the figure below There is no frictional force on the car, the track is horizontal, and the car is initially at rest. The gun then fires a shell of mass 40 kg with a velocity of 299 m/s at an angle of 35° with respect to the horizontal. Find the recoil velocity of the car?
Calculate escape velocity for an object started at the surface of the earth, going straight up. Neglect any complications due to the earth turning.
A 2.00 kg. frictionless block is attached to an ideal spring with force constant 300 n/m. At t=0 the block has velocity -4.0 m/s, what is the position of the block when its speed is 2.5 m/s
When two sticks are laid end-to-end they cover a length of 8.32 feet. What is the length of the shorter stick
What is the diameter of a copper sphere that has the same mass as a 2.00 cm x 2.00cm x 2.00 cm cube of aluminum?
A standard 100 W (120 V) lightbulb contains a 7.70cm-long tungsten filament. What is the diameter of the filament
the surface of the sun has a temperature of about 5800 k. if the radius of the sun is 7 x 10^8 m, determine the power output of the sun
What minimum force must be applied to the crate perpendicular to the incline to prevent crate from sliding down the incline.
A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 56.5° above the horizontal. By how much does the rocket clear the top of the wall
A geologist finds that a Moon rock whose mass is 10.15 kg has an apparent mass of 5.68 kg when submerged in water. What is the density of the rock
A long solenoid has 231 turns in a length of 13 cm, radius of 1.8 cm, and I= 1.3 A. Find the magnitude of the average induced emf in the coil
A 115 mCi radioactive tracer is made in a reactor. When delivered to a hospital 16 hours later its activity is 95 mCi. What is the tracer's half-life
the top of the pool table is 0.710m from the floor. the placement of the tape is such at 0m aligns to the edge of the table. at what speed did his pool ball hit the ground
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