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Once upon a time, a famous zoologist was hunting antelope for a zoo with a dart gun that fired darts with a range of 100 m at a speed of 25 m/s. If he shot a dart at an antelope at rest 50 m away, and the antelope instantly began to accelerate at a constant rate away from the dart, running out of range of the dart just in time:
a) Find the minimum acceleration of the antelope;
b) Find the maximum time the antelope can remain in range of the dart;
c) Find the minimum speed of the antelope as it runs out of range of the dart.
A concrete block of msss 10kg is pulled 7.0m across a frictionless surface by means of a rope and the net work done on the block is 220J. obtain the magnitude of the normal force acting on the block
Consider a container insulated from the environment and divided into two sections by a very thin, stiff membrane, In which direction heat energy is transferred
A beam of light strikes a sheet of glass at an angle of 57.0deg. with the normal in air. You observe that red light makes an angle of 38.1 degrees with the normal in the glass, What are the speeds of red and violet light in the glass
a crowbar 2m long is used to lift a rock 800n. if the fulcrum is 0.25m from where the crowbar touches the rock, how much effort must be applied to move the rock
A uniform 2 kg cylinder of radius 0.15m is suspended by twostrings wrapped around it. obtain the acceleration of the center of mass of the cylinder
A certain light-bulb has a tungsten filament. It has a power of 100 W when attached to 120 V potential difference. Calculate the resistance of the filament
A 1000 kg car pushes a 2000 kg truck that has a dead battery. When the driver steps on the accelerator, What is the magnitude of the force of the car on the truck
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800kg/m3 , length 91.6cm and diameter 3.00cm from a storage room to a machinist. Calculate the weight of the rod
After the first snow of the winter, you and your friends go sledding on the Tecumseh Street overpass of I-35. If the snow is frictionless, the length of the hill is 23 meters, and the angle of the hill is 40 degrees from the horizontal, how fast will..
Radio waves travel at a speed of 1.7 x 108 m/s through ice. A radio-wave pulse sent into the antarctic ice reflects off the earth at the bottom and returns to the surface in32.9 x 10-6 s.
one can rearrange these terms to dpdtv dsdvt. consider the vapor pressure diagram for water. if the slope of the
A string requires a 186 N force in order to break. A 1.50 kg mass is tied to this string and whirled in a vertical circle with a radius of 1.90 m. What is the highest speed that this mass can be whirled without breaking the string.
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