(a) Explain why momentum is a vector quantity. (b) The crumple zone at the front of a car is designed to collapse during a collision. concrete wall crumple zone Fig. 2.1 In a laboratory test, a car of mass 1200 kg is driven into a concrete wall, as shown in Fig. 2.1. A video recording of the test shows that the car is brought to rest in 0.36 s when it collides with the wall. The speed of the car before the collision is 7.5 m/s. Calculate O the change of momentum of the car, change of momentum =. (O the average force acting on the car.

(a) Explain why momentum is a vector quantity. (b) The crumple zone at the front of a car is designed to collapse during a collision. concrete wall crumple zone Fig. 2.1 In a laboratory test, a car of mass 1200 kg is driven into a concrete wall, as shown in Fig. 2.1. A video recording of the test shows that the car is brought to rest in 0.36 s when it collides with the wall. The speed of the car before the collision is 7.5 m/s. Calculate O the change of momentum of the car, change of momentum =. (O the average force acting on the car.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.

Question

(c) A different car has a mass of 1500 kg. It collides with the same wall and all of the energy
transferred during the collision is absorbed by the crumple zone.
(O The energy absorbed by the crumple zone is 4.3 x 10°J. Show that the speed of the car
before the collision is 24 m/s.
() Suggest what would happen to the car if it is travelling faster than 24 m/s when it hits
the wall.

(a) Explain why momentum is a vector quantity.
(b) The crumple zone at the front of a car is designed to collapse during a collision.
concrete wall
crumple
zone
Fig. 2.1
In a laboratory test, a car of mass 1200 kg is driven into a concrete wall, as shown in Fig. 2.1.
A video recording of the test shows that the car is brought to rest in 0.36 s when it collides
with the wall. The speed of the car before the collision is 7.5 m/s.
Calculate
O the change of momentum of the car,
change of momentum
O the average force acting on the car.
average force =
.....

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