The speed of a bus weighing 4 tons on a certain section of the route increased from 5 to 10 m / s.

| February 4, 2021 | education

The speed of a bus weighing 4 tons on a certain section of the route increased from 5 to 10 m / s. Determine the change in impulse of the bus.

In order to solve this problem, you need to know the formula for finding the momentum of the body, knowing the body’s mass and its speed. Formula for solving this problem:

p = m * v, where v is the speed of the body at a given moment in time, m is the mass of the body, p is the momentum of the body at a given moment in time.

First, we find the impulse of the bus at the moment when its speed was 5 m / s. It is important not to forget to convert the mass of the bus to the SI system.

4 t = 4000 kg

p = m * v = 4000 * 5 = 20,000 m / s ^ 2

Next, we find the impulse of the bus at the time when its speed was 10 m / s:

p = 4000 * 10 = 40,000 m / s ^ 2

Now we determine the change in impulse by subtracting the initial impulse from the final impulse.

dp = 40,000 – 20,000 = 20,000 m / s ^ 2

Answer: the change in momentum is 20,000 m / s ^ 2.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.