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does moving bodies have impulse?
Which answer is more accurate?
1)Yes,it has impulse when it is moving with variable velocity.
2)No,it it do not have impulse .It has impulse only when it collide with other body over a period of time according to the definition of impulse.
3 Answers
- Blue_FoxLv 61 decade agoFavorite Answer
Answer (1) is right. A body has impulse even when it is moving. Impulse can be defined as follows
An impulse may be regarded as the change in momentum of an object to which a force is applied. The impulse may be expressed in a simpler form when both the force and the mass are constant
In the technical sense, impulse is a physical quantity, not an event or force.
I =F Δt = mΔv = Δp where
F is the constant total net force applied,
Δt is the time interval over which the force is applied,
m is the constant mass of the object,
Δv is the change in velocity produced by the force in the considered time interval, and
mΔv = Δ(mv) is the change in linear momentum
Δp is the change in momentum from time t1 to t2
- OldPilotLv 71 decade ago
Moving bodies have Momentum. To change Momentum you must apply force for some time period. So, I would go with #2.
Momentum = Mass * velocity
Change Momentum = Impulse = Force * time
But, then #1 is correct also. Changing velocity implies changing momentum. #2 may fail since "collision" is not required. On second thought #1 is better.
Pretty poor options actually. The difference between #1 and #2 is too subtle.
- 1 decade ago
when bodies move they have certain velocity.change in velocity is acceleration.mass x acceleration = force. force x time = impulse.[if the body has mass]
