Can someone explain to me why we put these answers ? A force is a vector quantit
ID: 1875240 • Letter: C
Question
Can someone explain to me why we put these answers ?
A force is a vector quantity because it has botlh A) mass and acceleration B) action and reaction counterparts C) magnitude and direction If an object's mass is decreasing while a constant force is applied to the object, the acceleration A) remains the same. B) decreases ,C) increases. For an action force, there must be a reaction force that A) is exactly equal in magnitude. B) always acts in the same direction. C) is slightly smaller in magnitude than the action force D) is slightly larger in amplitude than the action force A baseball player bats a ball with a force of 1000 N. The reaction force that the ball exerts against the bat is A) more than 1000 N C) 1000 N. B) less than 1000 N D) impossible to determine If you push an object a given distance, while applying twice the force, you do A) twice as much work. C) half as much work. B) four times as much work D) the same amount of work A job is done slowly, while an identical job is done quickly. Both jobs require the same amount of work, but different a mounts of A) effort power Ceergy.D) none of theseExplanation / Answer
vector quantity has both mganitude and direction.
Suppose you are told about that a force is acting.
then we will need two information.
how much is force ( e.g. 14 N )
and in which direction it is acting.
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F = m a
F is constant so if m decreases then a will increase.
Ans(C)
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from Newton's 3rd law,
for an action force there is a reaction force of same magnitude in opposite direction.
Ans(A)
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As explained above.
reactin force will be of same magnitude.
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W = F d
F is same and d is doubled.
then W will also doubled.
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Power = work / time
Work is same but time is different. (work and energy are equivalent)
for quick, time will be less so power will be greater.