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Q1. A small wooden block with mass 0.900 is suspended from a lower end of a light cord that is 1.50 long. The block is at first at rest. A bullet with mass 0.0106 is fired at the block with a horizontal velocity. The bullet strikes the block and becomes embedded in it. After the collision the combined object swings on the end of the cord. As the block has raised a vertical height of 0.725, the tension in the cord is 4.66 .What is the velocity of the bullet originally.
Q2. One simple model for a person running the 100 m dash is to suppose the sprinter runs with constant acceleration until reaching top speed, then maintains that speed through the finish line. If a sprinter reaches his top speed of 11.5 m/s in 2.24 s, what will be his total time?
Q3. An insulating spherical shell with inner radius 25.0 rm cm and outer radius 60.0 rm cm carries a charge of + 150.0 mu {rm C} uniformly distributed over its outer surface. Point a is at the center of the shell, point b is on an inner surface and point c is on the outer surface.
To make a simple microscope a student places two converging lenses of +20 D at opposite ends of a 34 cm long tube. What is the tube length of the microscope
A bolt comes loose from underneath an elevator that is moving upward at a speed of 6.9 m/s. What is the speed of the bolt when it hits the bottom of the shaft
A 270 m wide river flows due east at a uniform speed of 2.30 m/s. A boat with the speed of 8.4 m/s relative to water leaves the south bank pointed in a direction 38o west of north. What is (a) magnitude and (b) direction of the boat's velocity rel..
A 56.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 1.24 102 m/s from the top of a cliff 146 m above level ground, What is the initial total mechanical energy of the projectile
A 12 volt battery is connected to a 2.0 x 10^-5 farad capactior. calculate the amount of charge on one plate of the capacitor.
A spherical mirror is to be used to form, on a screen located 5.0 m from the object, What should the radius of curvature be for the mirror
A planet of mass 8 × 10^24 kg is at location ‹ -4 × 10^11, 7 × 10^11, 0 › m. A star of mass 7 × 10^30 kg is at location ‹ 5 × 10^11, -5 × 10^11, 0 › m. What is the force exerted on the planet by star? (It will probably be helpful to draw the diagr..
A 12 volt battery powers a circuit that consists of a ten ohm resistor in series with a ten ohm and a 15 ohm that are in parallel. How much current flows through the 15 ohm resistor
A baseball has a velocity of 41.5 m/s (92.8 mi/h), directed horizontally, as it is released by a pitcher. Calculate the ball's instantaneous acceleration just before it is released
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 8.77 m, what is the magnitude of the astronaut's linear speed
Before beginning a long trip on a hot day, a driver inflates an automobile tire to a gauge pressure of 2.60 atm at 300 K. what is the temperature of the air inside the tire
What is the density of Kripton gas at standard temperature and pressure? The atomic mass of Kripton is 83.80 atomic mass unit
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