Question

Дано h=60м m=2т t=40сN-?

Answer 1

(60+40)×2=200
60+40=100
100×2=200

Answer 2

Calculating the Force

To calculate the force (N), we can use the formula:

F = m * a

Where: - F = force (in newtons, N) - m = mass (in kilograms, kg) - a = acceleration (in meters per second squared, m/s^2)

Given: - h = 60 m - m = 2 t (tonnes) - t = 40 s

First, we need to convert the mass from tonnes to kilograms. 1 tonne is equal to 1000 kilograms.

So, m = 2 t = 2 * 1000 kg = 2000 kg

Next, we need to calculate the acceleration. The acceleration can be calculated using the formula:

a = Δv / Δt

Where: - Δv = change in velocity - Δt = change in time

Given: - h = 60 m - t = 40 s

We can use the following kinematic equation to calculate the acceleration:

h = (1/2) * a * t^2

Solving for a: a = 2h / t^2

Substitute the given values: a = 2 * 60 m / (40 s)^2

Let's calculate the acceleration: ``` a = 2 * 60 / (40 * 40) = 0.075 m/s^2 ```

Now that we have the mass and acceleration, we can calculate the force using the formula: F = m * a

Substitute the given values: F = 2000 kg * 0.075 m/s^2

Let's calculate the force: ``` F = 2000 * 0.075 = 150 N ```

Conclusion

The force (N) exerted is 150 N.