The final velocity of the passenger is zero as he is brought to rest by the inflated bag.
Apply the equation of motion
Replacing with our values,
Calculate the force using the force equation,
Therefore the magnitude of force acts on the passenger's upper torso is 34.923kN
Answer:
P = 11666.6 W
Explanation:
Given that,
Work done by the motor, W = 3500 kJ
Time, t = 5 min = 300 s
We need to find the power developed by the motor. Power developed is given by :
So, the required power is 11666.6 W.
The change in the momentum of the car due to collision between car and wall is or
.
Further Explanation:
Let us consider the car is moving towards the right direction and it collides with the wall. After the collision, the car will bounce back or car will rebound opposite to the direction of its motion i.e., towards left. Therefore, the final velocity of the car is opposite to the direction of the initial velocity of the car.
Given:
The mass of the car is .
The velocity of the car before collision is .
The velocity of the car after collision is .
Concept:
The momentum of an object is defined as the product of mass of object and the velocity with which the object is moving.
The initial momentum of the car is:
…… (I)
Here, is the initial momentum of the car,
is the mass of the car and
is the initial velocity of the car.
Substitute for
and
for
in equation (I).
The final momentum of the car is defined as the product of mass of car and the velocity of the car after collision or final velocity of the car.
The final momentum of the car is:
…… (II)
Here, is the final momentum and
is the final velocity.
Substitute for
and -
for
in equation (II).
The change in the momentum of the car after collision is the difference between the momentum of car before collision and the momentum of car after collision.
The change in momentum of the car is:
…… (III)
Here, is the change in the momentum of the car.
Substitute for
and
for
in equation (III).
Thus, the change in the momentum of the car due to collision between car and wall is or
.
Learn more:
1. The motion of a body under friction brainly.com/question/4033012/
2. A ball falling under the acceleration due to gravity brainly.com/question/10934170/
3.Conservation of energy brainly.com/question/3943029/
Answer Details:
Grade: College
Subject: Physics
Chapter: Kinematics
Keywords:
Change in momentum, collision, initial velocity, final velocity, initial momentum, final momentum,-23450 kgm/s^2, -23450 kgm/s2, -2.3450*10^6 kgm/s^2, -2.3450*10^6 kgm/s2.
