The British thermal unit (BTU or Btu) is a traditional unit of work equal to about 1055 joules. It is the amount of work needed to raise the temperature of one pound of water by one degree Fahrenheit (Physical analogue: one four-inch wooden kitchen match consumed completely generates approximately 1 BTU). BTU is the amount of heat required to raise the temperature of 1 avoirdupois pound of liquid water by 1 degree Fahrenheit at a constant pressure of one atmosphere. calorie, several definitions of the BTU exist, because the temperature response of water to heat energy is non-linear.
When an object free falls, it does not encounter a significant force of air resistance. Always Some Air Resistance. However, a falling object is going to run into some degree of air resistance. Air resistance is the outcome of collisions between the objectâs leading surface and air molecules. How much air resistance the object encounters depends on the speed the object is traveling and the cross sectional area of the object. When the object is falling faster, this increases air resistance.
5. An object of mass 30 kg is falling in air and experiences a force due to air resistance of 50 newtons. 1  Determine the net force acting on the object and. 2  calculate the acceleration of the object. ans0405 (39.0K).. For a person who has a mass 60 kg, calculate the weight in newtons and in pounds. ans0409 (37.0K). 10. An object of mass 10 kg is accelerated upward at 2 m/s 2.