A 2-kg object is dropped from a height of 10 meters. Using the formula (use g=10m/s2), the potential energy is calculated as . If the object strikes the ground with a speed of 5 m/s, then using the formula , the kinetic energy is 100 joules. This requires that of energy is turned into and eventually released to its surroundings.

Total of 175 J of energy is turned into and eventually released to the surroundings

Explanation:

The potential energy is mgh = 2 * 10* 10 = 200

Kinetic energy = 1/2 mv^2 = 0.5 *2 * 5 *5 = 25

Loss in energy = 200 -25 = 175

Total of 175 J of energy is turned into and eventually released to the surroundings

the answer for 3 is b and the answer for 4 is d

  the common sense as a pamphlet written by thomas paine. it promoted the independence of the colonies from british rule. the distribution of this pamphlet was great, it reached people everywhere and it was even read aloud at places people met. it also unite the colonists before the revolutionary war.

answer is d