Question

Помогите пожалуйста!!1 Какая работа совершена при штамповке пластмассового изделия под поршнем гидравлического пресса,если перемещение поршня составило 17мм,а развиваемая при прессовании сила равна 12 кН? 2.Металлический шар массой 1.5кг падает на землю с высоты 2м.Какую работу при этом совершает сила тяжести?

Answer 1

1) A = F*S = 12000 H*0.017 м = 204 Дж

2) A = mgh = 1,5 кг*10 Н/кг*2м = 30 Дж

Answer 2

1. работа в нас находиться за формулой А=FS,

F=12кН=12000Н

S=17mm=0,017м

А=12000*0,017= 204 Дж.

2. работа силы тяжести A = mgh

g(ускорение свободного падения)=9,8=(приближенно равно) 10, тогда получаем

А=1,5*10*2=30 Дж.

Answer 3

Work done during plastic molding under a hydraulic press piston:

When a plastic object is molded under a hydraulic press piston, work is done on the plastic material. The work done can be calculated using the formula:

Work = Force × Distance

In this case, the force exerted by the hydraulic press piston is 12 kN (kilonewtons) and the displacement of the piston is 17 mm (millimeters). However, we need to convert the displacement to meters before calculating the work.

Converting 17 mm to meters: 1 meter = 1000 mm So, 17 mm = 17/1000 = 0.017 meters

Now, we can calculate the work done: Work = Force × Distance Work = 12 kN × 0.017 meters

To calculate the work, we need to convert the force from kilonewtons to newtons: 1 kilonewton (kN) = 1000 newtons (N) So, 12 kN = 12 × 1000 N = 12000 N

Substituting the values into the formula: Work = 12000 N × 0.017 meters

Calculating the work: Work = 204 N·m (newton-meters) or joules (J)

Therefore, the work done during the plastic molding process under the hydraulic press piston is 204 N·m or 204 joules (J) [[1]].

Work done by the force of gravity when a metal ball falls:

When a metal ball falls under the influence of gravity, work is done by the force of gravity. The work done can be calculated using the formula:

Work = Force × Distance

In this case, the force is the force of gravity acting on the ball, and the distance is the height from which the ball falls.

The force of gravity can be calculated using the formula:

Force of gravity = mass × acceleration due to gravity

The mass of the metal ball is given as 1.5 kg (kilograms), and the height from which it falls is 2 m (meters).

The acceleration due to gravity is approximately 9.8 m/s^2 (meters per second squared).

Calculating the force of gravity: Force of gravity = mass × acceleration due to gravity Force of gravity = 1.5 kg × 9.8 m/s^2

Substituting the values into the formula: Force of gravity = 14.7 N (newtons)

Now, we can calculate the work done: Work = Force × Distance Work = 14.7 N × 2 m

Calculating the work: Work = 29.4 N·m (newton-meters) or joules (J)

Therefore, the work done by the force of gravity when the metal ball falls from a height of 2 m is 29.4 N·m or 29.4 joules (J) [[2]].