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A 73.0 kg base runner begins his slide into second base when moving at a speed of 4 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. How much mechanical energy is lost due to friction acting on the runner? How far does he slide?
A 7 kg ball is lifted from the ground to a height of 45 meters above the ground. The ball is then dropped. After the ball has fallen 5.5 m, what is it's PE and KE and how fast is it going?
The tension in a string is 20.6 n and its linear density is .649 kg/m. A wave on the string travels in the -x direction. It has amplitude of 3.71 cm and a frequency of 10.6 hz. What are the speed and wavelength of wave.
A 38 ohm resistor is made from a coil of copper wire whose total mass is 11.2 g. Find out the length and diameter of the wire.
In a nuclear experiment a proton with kinetic energy 1.5 MeV moves in a circular path in a uniform magnetic field. What energy (in MeV) must (a) an alpha particle (q = +2e, m = 4.0 u) and (b) a deuteron (q = +e, m = 2.0 u) have if they are to circ..
Find the magnitude and direction of the force on a proton at x = -3.2 m, y = 0.9 m.
A spring with a force constant of 130 is attached to the backpack and pulled horizontally, as indicated in the figure .If the backpack begins to slide when the spring ( = 130 ) stretches by 2.40, illustrate what is the coefficient of static fric..
A small immersion heater is rated at 352 W. Estimate how long it will take to heat a cup of soup (suppose this is 250 mL of water) from 20°C to 50°C.
If a bullet is fired vertically upwards with the speed calculated in (b), what is the maximum height that the bullet can reach.
Water flows at 5.0;{rm L}/{rm s} through a horizontal pipe that narrows smoothly from 10 cm diameter to 5.0 cm diameter. A pressure gauge in the narrow section reads 50 kPa. What does the other pressure gauge read.
A stationary radar operator determines that a ship is 17 km south of him. An hour later the same ship is 21 km southeast. If the ship moved at constant speed and always in the similar direction, what was its velocity during this time.
An electron traveling horizontally to the right enters a region where a uniform electric field is directed downward. What is the direction of the electric force exerted on the electron once it enters the electric field? A. to the left B. to the ri..
You throw a ball vertically upward so that it leaves the ground with velocity 6.05 m/s. (a) What is its velocity and direction when it reaches its maximum altitude? magnitude m/s
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