Answer You need to consider that the gravity on earth is 9.8 m/s/s. This means any object you let go on the earths surface will gain 9.8 m/s of speed every second. You need to apply a force on the object in the opposite direction to avoid this acceleration. If you are pushing something up at a constant speed, you are just resisting earths acceleration. The more massive and object is, the greater force is needed to accelerate it. The equation is Force = mass*acceleration. So for a 2kg object in a 9.8 m/s/s gravity you need 2kg*9.8m/s/s = 19.6 Newtons to counteract gravity. Work or energy = force * distance. So to push with 19.6 N over a distance of 2 meters = 19.6 N*2 m = 39.2 Joules of energy. There is an equation that puts together those two equations I just used and it is E = mgh
The amount of Energy to lift an object is (mass) * (acceleration due to gravity) * (height)
:Hence, the Work done to life the mass of 2 kg to a height of 10 m is 196 J. Hope it helps❤️❤️❤️
Explanation:
Answer:
Bueno, sabemos que el volumen del monolito es 108m^3, y sabemos que el material es granito.
La densidad del granito es alrededor de 2.7 g/cm^3.
Entonces primero tenemos que convertir esto en m^3.
1m = 100cm
1m^3 = (100cm)^3 = 1000000cm^3.
1kg = 1000g.
Entonces tenemos el cambio de unidades:
2.7 g/cm^3 = 2.7*(1000000/1000) kg/m^3 = 2700 k/m^3.
y sabemos que:
densidad = masa/volumen
densidad*volumen = masa.
(2700kg/m^3)*108m^3 = 291600 kg.
The percentage of railroad crossing crashes that results from a vehicle driving into the side of a train is 25%.
These crashes usually occur as the result of drivers intentionally circumventing warning equipment used at railroad crossings. Drivers typically used their senses to determine the proximity of the train and attempt to cross quickly rather than wait for the train to pass before crossing.
Answer:
s= 1/2 at^2 = 1/2 (5)(3)^2 = 45/2 = 22.5 meters.
Explanation:
Answer:
D.The camera lens refracts light when it travels through the lens and bends.
Explanation:
because