Question

Чему будет равен вес груза массой 100кг при равноускоренном подъеме его в лифте если известно что лифт двигает скорости 3 м\с пройдя путь 18 м?

Answer 1

N-m*g=m*a
S=(v-v0)/2*a
a=(v-v0)/2*S
\N\=\-P\
P-m*g=m*(v-v0)/2*S     v0=0 ⇒
P-m*g=m*v/2*S 
P=m*v/2*S+m*g
P=100*3/2*18+100*10=1008.3 H

Answer 2

Calculation of the Weight of the Load in the Elevator

To calculate the weight of the load in the elevator during an accelerated ascent, we need to consider the mass of the load, the velocity of the elevator, and the distance traveled by the elevator.

Given: - Mass of the load (m) = 100 kg - Velocity of the elevator (v) = 3 m/s - Distance traveled by the elevator (S) = 18 m

To calculate the weight of the load, we can use the formula:

Weight (W) = mass (m) * acceleration due to gravity (g)

Acceleration due to gravity is approximately 9.8 m/s^2.

However, the information provided does not directly give us the acceleration of the elevator. We can make some assumptions to proceed with the calculation.

Assumption: - The elevator starts from rest and reaches a constant velocity of 3 m/s over the distance of 18 m.

Using the equation of motion for uniformly accelerated motion:

v^2 = u^2 + 2as

where: - v is the final velocity (3 m/s) - u is the initial velocity (0 m/s) - a is the acceleration - s is the distance traveled (18 m)

Rearranging the equation, we can solve for the acceleration:

a = (v^2 - u^2) / (2s)

Substituting the given values:

a = (3^2 - 0^2) / (2 * 18) = 9 / 36 = 0.25 m/s^2

Now that we have the acceleration, we can calculate the weight of the load using the formula mentioned earlier:

Weight (W) = mass (m) * acceleration due to gravity (g)

W = 100 kg * 9.8 m/s^2 = 980 N

Therefore, the weight of the load with a mass of 100 kg during the accelerated ascent of the elevator is 980 Newtons.

Please note that the calculation assumes a constant acceleration throughout the entire distance traveled by the elevator. In reality, the acceleration may vary during the ascent, which could affect the accuracy of the calculated weight.