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A 76 kg jumper lands stiff-legged on the floor and changes his velocity from -8 m/s to zero in 0.3 seconds. Compute the average ground reaction force under his feet during this time interval. If he increased the impact time to 0.4 s, what happens to the ground reaction force? (Caution: net force and ground reaction force is not the same thing! Be careful here!).
An electron is projected with an initial speed 1.00×106 into the uniform field between the parallel plates. Suppose that field between the plates is uniform and fixed vertically downward, and that field outside the plates is zero. The electron enters..
A gas of 1.50×10^20 atoms or molecules has 0.900 J of thermal energy. evaluate the temperature of the gas
Six mass pieces of 100g each are placed on a mass holder of 140g which is hung from a string. Analyse the tension in the string.
Calculate the acceleration of a bus that goes from 57.6 km/h to a speed of 99.79 km/h in 10 s
A straight wire segment 4 m long makes an angle of 30° with a uniform magnetic field of 0.37 T. Find the magnitude of the force on the wire
You slide a box of books at constant speed up a 30 degree ramp, applying a force of 160 N directed up the slope. What is the mass of the box
Two tugboats pull a disabled super tanker. Each tug exerts constant force of 1.20 multiplied by 106 N, one 19° west of north and the other 19.0° east of north, as they pull the tanker 0.69 km toward the west. What is the total work they do on supe..
A solid sphere of mass 4.0kg and radius of 0.12m is at rest at the top of a ramp inclined 15degrees. It rolls to the bottom without slipping. What is the liner speed of the sphere
A bus is traveling up a hill at a speed of 34m/s. The hill is 23 degrees relative to horizontal and the coefficient of static friction between the bus's tires and the road is 0.6
What is the magnitude of buoyancy force ?
A certain laboratory experiment requires an aluminum wire of length of 36.0 m and a resistance of 2.80 ? at 20.0°C. What diameter wire must be used
A railroad car with a mass of 20,000 kg rolls into a second stationary car with a mass of 40,000 kg. How fast was the first car moving before the collision
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