Question

Автомобиль m=2000кг начинает разгоняться в течение 10с он преобретает скорость 43,2км/ч опредилите величину импульса,величину действующей силы

Answer 1

Скорость в систему Си
43.2км/ч=12м/c
Импульс
p=mv
p=2000*12
p=24000 кг * м/c
a=12/10
a=1.2 м/c^2
F=ma
F=2000*1.2
F=2400Н или 2.4 кН

Answer 2

Calculation of Impulse and Force

To calculate the impulse and force exerted on a car, we need to use the formula:

Impulse (J) = mass (m) × change in velocity (Δv)

The mass of the car is given as 2000 kg, and the change in velocity is given as 43.2 km/h. However, we need to convert the change in velocity to meters per second (m/s) to match the unit of mass.

To convert km/h to m/s, we can use the conversion factor: 1 km/h = 0.2778 m/s.

Let's calculate the impulse:

Impulse (J) = 2000 kg × (43.2 km/h × 0.2778 m/s per km/h)

Now, let's calculate the force exerted:

Force (F) = Impulse (J) / time (t)

The time given is 10 seconds.

Let's calculate the impulse and force:

Impulse (J) = 2000 kg × (43.2 km/h × 0.2778 m/s per km/h) = 2000 kg × (43.2 × 0.2778) m/s = 2000 kg × 12.0016 m/s = 24003.2 kg·m/s

Force (F) = 24003.2 kg·m/s / 10 s = 2400.32 N

Therefore, the impulse of the car is 24003.2 kg·m/s and the force exerted on the car is 2400.32 N.

Please note that the calculations provided are based on the given information and assumptions.