Objects accelerate at ~9.8 Meters per second per second (9.8 Meters peer sec^2. (or ~32 feet per sec^2 for you non metric guys) As they gain speed they will reach a maximum velocity limited by atmospheric resistance, when the resistance vector equals the gravity vector and all acceleration will cease. In a vacuum the object will continue to accelerate.
Natural resources are found in abundance in the US.
Explanation:
The United States boasts of rich renewable and non-renewable natural sources.
Land: Large landmass is a huge advantage and being under one nation or government leads to great industrial, agricultural and economic development
- Farmland: America boasts huge farmlands where mechanized agriculture is done on a large scale
- Minerals: A number of minerals like copper, gold, iron ore, coal etc are found in abundance
- Forests: The rich and different types of forests found in North America provides huge resources of timber
Water: The large coastline, huge lakes, and rivers all form a great resource for fishing, water recreational activities, oil drilling and other industries.
Energy sources: The U.S. is rich with energy sources like coal, oil, petroleum, and natural gas. Mining, especially of coal, is one of the chief industries in the U.S. The U.S. is a key oil producer in the World.
We have to assume that the truck was not moving
before he started pushing it.
After he did 12 J of work pushing it, the truck had
12 J of kinetic energy.
Kinetic energy = (1/2) (mass) (speed²)
12 J = (1/2) (3 kg) (speed²)
Divide each side by 1.5 kg : 12J / 1.5 kg = speed²
1 J = 1 newton-meter (12 kg-m²/sec²) / (1.5 kg) = speed²
= 1 kg-m² / sec²
(12 / 1.5) ( m²/sec²) = speed²
Speed = √(8 m²/s²)
Speed = 2.83 m/s .
We can't say anything about velocity, because we don't know
anything about the direction in which the truck is moving.
Answer:
m = 73.88 kg
Explanation:
total momentum = 0
P_1 +P_2 = 0
P_1 =P_2
WE KNOW THAT MOMENTUM IS GIVEN BY:
![P_1 =\frac{mv_1}{\sqrt{1 -\frac{v_1^2}{c^2}}} [tex] =\frac{190*.280}{\sqrt{1 -\frac{0.280^2}{c^2}}}](https://tex.z-dn.net/?f=P_1%20%3D%5Cfrac%7Bmv_1%7D%7B%5Csqrt%7B1%20-%5Cfrac%7Bv_1%5E2%7D%7Bc%5E2%7D%7D%7D%20%3C%2Fp%3E%3Cp%3E%20%5Btex%5D%20%3D%5Cfrac%7B190%2A.280%7D%7B%5Csqrt%7B1%20-%5Cfrac%7B0.280%5E2%7D%7Bc%5E2%7D%7D%7D)
= 55.41c
second momentum with light velocity
solving for m we get
m = - 73.88 kg
-ve show that second mass moves in opposite direction to first mass.
