GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A ring moving at 5 m/s eastward
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A rubber ball bouncing up and down the ground
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A confetti thrown from the ceiling of a concert venue
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A car moving at 7 m/s left then right at the same speed
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Detailed explanation-1: -The impulse experienced by an object is the force•time. The momentum change of an object is the mass•velocity change. The impulse equals the momentum change.
Detailed explanation-2: -Impulse is a certain amount of force you apply for a certain amount of time to cause a change in momentum. That is why it is F*t. For example, when you hit a ball with a cricket bat, you apply a force for a time(a very short period in this case) to cause a change (or transfer) of momentum in the ball.
Detailed explanation-3: -Car airbags and cushioned gymnasiums are examples of using the concept of impulse to reduce the force of impact. Having great racquet head speed increases the force on a tennis ball. This decreases the impact time between the ball and racquet, thereby increasing the force of impact.
Detailed explanation-4: -FALSE-The impulse encountered by an object is equal to mass multiplied by velocity change-that is, momentum change.