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A 1200 kg ore cart is rolling at 10.8 m/s across a flat surface. A crane dumps 691 kg of ore (vertically) into the cart. How fast does the cart move after being loaded with ore? Assume that frictional forces may be neglected.
During 6 successive intervals a runner moves at the following constant speeds: .326 km/min for 30 seconds, .123 km/min for 23 seconds, Compute the average speed of the runner
A boy of mass 60.8 kg is rescued from a hotel fire by leaping into a firefighters' net. The window from which he leapt was 9.5 m above the net. What is the average force on the net due to the boy during the interval
You fly your 20.0m -long spaceship at a speed of c/ 4 relative to your friend. determine the speed of your friend relative to you
A subway train starts from rest at a station and accelerates at a rate of 1.56m/s2 for 13.7s, Find the total distance covered
A 4200 kg truck is parked on a 24° slope. How big is the friction force on the truck
A soccer player 'heads' the size 5 ball deflecting it by 46.0°, and keeps its speed of 15.90 m/s constant. A size 5 ball has a mass of approximately 0.421 kg. What is the magnitude of the impulse which the player must impart to the ball.
A 38.0 kg child swings in a swing supported by two chains, each 3.04m long. The tension in each chain at the lowest point is 429N. Find out the child's speeds at the lowest point.
Two coils of wire are placed close together. Initially, a current of 2.3 A exists in one of the coils, What is the mutual inductance of the two-coil system
With the rod initially horizontal, a 44 gm wad of wet putty drops onto one of the balls with a speed of 3.7 m/sec and sticks to it.
We wish to maintain a pattern with a given number of loops and a fixed given frequency, If we reduce the density of the string
A cardinal (Richmondena cardinalis) of mass 4.00×10?2 and a baseball of mass 0.141 have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of the baseball's momentum?
If a 62.6 kg runner dissipates a power of 60.9 W during a race, explain how fast is the person running? Assume a running step is 1.50m in length
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