JEE Class main Answered
A particle is projected vertically upward with velocity 20m/s at the same instant another particle B is dropped from a tower of height 100m time at which B meet with A. ans is not 5sec
Asked by ashutosharnold1998 | 17 Oct, 2019, 01:19: PM
Expert Answer
Time for particle-A, which is projected vertically upwards, to reach maximum height is given by,
t = u/g = 20/9.8 = 2.04 s
maximum height reached bu particle-A, h = u2 / ( 2g ) = (20×20)/(2×9.8) = 20.41 m
Distance travelled by particle-B in 2.04 s , S = (1/2)g t2 = (1/2)×9.8×2.04×2.04 = 20.39 m
since particle-B is dropped from 100 m height, when particle-A reaches maximum height,
particl-B is ~60 m away from particle-A.
Hence they can not meet together during their flight.
Time to return to ground for particle-A is 4.08 s.
Time to reach ground for particle-B is obtained from, (1/2)gt2 = 100 or t = (200/9.8)1/2 = 4.52 s
Hence both will meet at 4.52 s from their staring time of motion.
Answered by Thiyagarajan K | 17 Oct, 2019, 02:54: PM
Application Videos
-
Elastic potential energy_Restoring force and spring con ...
In this video, the restoring force and spring constant is explained. The vi... -
Expression of Elastic potential energy_2
This video describes the potential energy of spring when it is compressed o... -
Potential Energy Curve
This video describes the potential energy curve and ature of forces based o... -
Work done by static friction
This video describes effect of static friction on the work done by the obje... -
Work done in conservative field - 1
The concept of conservative field, types of conservative forces and example...
JEE main - Physics
Asked by ashwinskrishna2006 | 07 May, 2024, 05:33: PM
ANSWERED BY EXPERTJEE main - Physics
Asked by srkgb8018 | 05 May, 2024, 10:12: PM
ANSWERED BY EXPERT
JEE main - Physics
Asked by sandhyapallapu22 | 03 May, 2024, 04:32: PM
ANSWERED BY EXPERTJEE main - Physics
Asked by gamingbadboy085 | 01 May, 2024, 06:28: PM
ANSWERED BY EXPERTJEE main - Physics
Asked by bhargavreddynellaballi | 30 Apr, 2024, 08:18: AM
ANSWERED BY EXPERTJEE main - Physics
Asked by ravichandraravula66 | 29 Apr, 2024, 11:20: AM
ANSWERED BY EXPERTJEE main - Physics
Asked by kmani310507 | 28 Apr, 2024, 04:38: PM
ANSWERED BY EXPERTJEE main - Physics
Asked by arivaryakashyap | 23 Apr, 2024, 10:40: AM
ANSWERED BY EXPERTJEE main - Physics
Asked by ratnadeep.dmr003 | 21 Apr, 2024, 11:06: PM
ANSWERED BY EXPERT
