Other Physics Answers

The makers of a certain automobile advertise that it will accelerate from 15 to 50 mi/hr in 13 s. What is the value of the initial velocity in m/s?

1. What is the rotational analog force?

a. angular momentum

b. angular velocity

c. moment of inertia

d. torque

 If the coefficient of friction between tires and roadway is 0.50, what is the smallest radius at which 

     a car can turn on a horizontal road when its speed is 30 miles/hour? 

. A power station conveyor lifts 500 tons of coal per hour to a height of 80 feet.  What average  

     horsepower is required? 

A stone is thrown at an initial speed of 125 ft/s directed 60

above the horizontal at the cliff of  

    height, y. The stone strikes the cliff 5.8 seconds after launching. Find the height of the cliff and 

    the speed of the stone just before impact at the top of the cliff. 

What is the resultant of a displacement 6.0 miles North and one 9.0 miles   East? 

IV. An iron wire 1.0 m long with a square cross-section 2.0 mm on a side is used  

              to support a 100 kg load. Find the change in length. 

VI. Find the maximum speed of a particle that undergoes SHM with a period of 

             0.50 s and an amplitude of 20 mm. 

Consider radium, which has a half-line of 1620 years. How many atoms of radium will decay in 5 s in 15 g of its sample? Consider the atomic weight of radium to be 226 kg/mol.

  IV. An iron wire 1.0 m long with a square cross-section 2.0 mm on a side is used  

              to support a 100 kg load. Find the change in length.