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A wagon is rolling forward on level ground. Friction is negligible.The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 91 kg. The mass of the rock is0.30 kg. Initially the wagon is rolling forward at a speed of 0.52m/s. Then the person throws the rock with a speed of 15 m/s. Both speeds are relative to the ground. Find the speed of the wagon after the rock is thrown(a) directly forward in one case and (b) directly backward in another.
The catapult on an aircraft carrier can take an aircraft from 0 to 216 mph in 8 seconds, at which time the aircraft launches
A gasoline engine in a large car takes in 10,500J of heat and delivers 2450J of mechanical work per heat cycle. How much gasoline is burned during each cycle
A 685 kg car stopped at an intersection is rear-ended by a 1470 kg truck moving with a speed of 12.5 m/s. find the final speed of both vehicles after the collision
Only two forces act on an object (mass=4.61 kg), as in the drawing. Find the direction (relative to the x axis) of the acceleration of the object
A wire 4 m long and with a mass of 0.5 g is under a tension of 112N. It is made out of the material aluminum. (a)What is the speed of transverse waves in the wire
An automobile with 0.200 m radius tires travels 70,000 km before wearing them out. How many revolutions do the tires make
In a two-slit interference pattern, the intensity at the peak of the central maximum is I_zero. I/I_zero = 0.772 if this helps Part B What is the path difference for light with a wavelength of 477 nanometers from the two slits at a point where the ph..
Sam's speed at the bottom is 35.0. Illustrate what is the coefficient of kinetic friction of his skis on snow?
A 200 g ball on a 55-cm-long string is swung in a vertical circle about a point 200 cm above the floor. What was the tension in the string an instant
A 4mm diameter circular coil of 25 turns and total resistance 0.001Ω lies in the x-y plane at a distance of 3m from a long straight current-carrying wire along the x-axis.
A runner is practicing on a circular track that is 675 m in circumference. If he runs halfway around the track and stops at the farthest eastern point of the track, what is the distance he traveled
A 1200kg car (A) traveling due north at 25m/s collides with a 2000kg truck traveling due west at 18m/s. What is the velocity of the wreckage just after the collison
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