Question

Whether a truck comes to a stop by crashing into a haystack or a brick wall, the impulse is:
Group of answer choices:
O both the same.
O greater with the haystack.
O greater with the brick wall.

Answer 1

Answer:

Both the same.

Explanation:

According to Newton's second law of motion,

Impulse = Change in momentum.

And change in momentum = (momentum before collision) - (momentum after collision)

And for this scenario, whether the car hits the haystack or the brick wall, it is said that the car comes to a stop. That Is, the momentum after collision (which is mass × velocity) is 0 because the final velocity in both cases is 0.

So, the impulse in both cases Is equal to the momentum of the truck before collision.

In both cases,

Impulse = (mass of truck × velocity of truck before collision)

Answer 2

The impulse of the truck whether it comes to a stop by crashing into a haystack or a brick wall is; both the same.

By virtue of Newton's second law of motion,

• Impulse = Change in momentum.

• Change in momentum = (momentum before collision) - (momentum after collision)

In the case in discuss;

Irrespective of what the car hits; the haystack or the brick wall, the car comes to a stop

In essence, the momentum after collision (which is mass × velocity) is 0 because the final velocity in either of the cases is 0.

Ultimately, since the final momentum is 0, the impulse in both cases Is equal to the momentum of the truck before collision.

In which ever case;

• Impulse = (mass of truck × velocity of truck prior to collision).

Consequently, the impulse is both the same.

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