Question

По льду озера груз весом 20Н был перемещён на расстояние 10 м , а затем поднят на высоту 1,5 м . Чему равна работа силы тяжести на всём пути?

Answer 1

Дано:

P=20H

S=10м

h=1,5м

g=10м/с2

A-?Дж

решение:

смотри тут можно найти работу двумя способами 1:

сначала найти массу m=P/g=20H/10м/с2=2кг

и по формуле A=mgh=2кг*10м/с2*10м=200Дж

и вот так 2:

по формуле A=PS=20H*10м=200Дж

вот так наверное!

Answer 2

Calculation of Work Done by the Force of Gravity

To calculate the work done by the force of gravity on the object, we need to consider two separate displacements: the horizontal displacement and the vertical displacement.

1. Horizontal Displacement: - The object was moved horizontally for a distance of 10 meters. - Since the force of gravity acts vertically downward, it does not do any work in the horizontal direction. - Therefore, the work done by the force of gravity in the horizontal displacement is zero.

2. Vertical Displacement: - The object was lifted vertically to a height of 1.5 meters. - The work done by the force of gravity can be calculated using the formula: work = force x distance x cos(theta), where theta is the angle between the force and the displacement. - In this case, the force of gravity is acting vertically downward, and the displacement is also vertical. - The angle between the force of gravity and the displacement is 0 degrees, so cos(0) = 1. - Therefore, the work done by the force of gravity in the vertical displacement is given by: work = force x distance x cos(0) = force x distance. - The force of gravity is equal to the weight of the object, which is given as 20 N. - The distance of the vertical displacement is 1.5 meters. - Therefore, the work done by the force of gravity in the vertical displacement is: work = 20 N x 1.5 m = 30 Joules.

In summary, the work done by the force of gravity on the object for the entire path is 30 Joules.