2 points
5. If the cable of a lift breaks
and the lift starts falling, what
will be the reading of your
weight on the machine? ufa
किसी लिफ्ट की केबल टूट जाती है और
लिफ्ट गिरने लगती है, तो मशीन पर
आपके भार का पाठ्यांक क्या होगा?
*
It will increase by 4 times | 4 गुना बढ़
जायेगा
It will increase by9.8 times|9.8 गुना
O
बढ़ जायेगा
It will decrease by 9.8 times |9. 8
O
गुना घाट जायेगा
O
It will keep changing randomly |अलग
अलग ढंग से बदलते रहेगा
O It will become zero| 0 हो जायेगा
Answers
Answer:
option b
Mrk me the brainliest
Given: The cable of a lift breaks and it starts falling.
To find: Reading of the weight on the weighing machine
Solution: The gravitational force exerted by Earth on a body is called the weight of the body.
The normal force is equal to the weight of the body inside the lift.
When the cable of the lift breaks, the lift experiences free fall. In this type of motion, no other force acts on the body except the gravitational force.
The body experiences a pseudo force in the direction opposite to the free fall of the lift. Therefore, the normal force and pseudo force acts upwards and the force on the lift acts downward.
Force on man due to free fall of lift
= Pseudo force on the man
= mg where m is the mass of man
Original Weight of man= Mass × g = mg
Therefore, the equation of motion becomes:
Normal force+ Pseudo force= Original weight of the man
=> Normal force + mg = mg
=> Normal force = 0
Since normal force is equal to the the weight of body inside lift, therefore, weight of man inside lift is 0.
Therefore, the reading of the weighing machine when the cable breaks is option (e) It will become zero.