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Physics, matching question?
Match 1-4 with a-d. Could you please explain your answer?
1.)Elevator is speeding up going down
2.)Elevator is speeding up going up
3.)Elevator is traveling at 5 m/s downward
4.)Elevator is in freefall
Available answers (each can only be used once):
a.)effective weight is greater than 700 N
b.)effective weight is equal to 700 N
c.)effective weight is less than 700 N
d.)effective weight is zero
2 Answers
- Paschal HLv 61 decade agoFavorite Answer
The first answer is wrong for 1 and 2.
Because you are accelerating down, you weight will be LESS, so:
1 <=> c
Because you are accelerating up, you weight will be MORE, so:
2 <=> a
- Anonymous1 decade ago
There are two forces involved, gravity and the normal force, in 1. your acceleration is going with gravity, but your normal force does not change. Therefore you would weigh less than normal, because your there is less pulling down on you, but the same pulling up. In 2. it is the opposite because your acceleration is opposing gravity. In 3. there is no acceleration so you are the normal weight. And in 4. the only force on you is gravity, but you could not feel it because there is no normal force pushing back up on you. Hope this helps.
1. a
2. c
3. b
4. d
