A ball rolls down an inclined track 2m long in 4s.find time taken to cover the second metre of the track
7 answers
Divide both values by 2.
Pe iska answer to dedo question to pucha he hae mne
Time taken to cover second metre
Distance traveled=1m
Acceleration=0.25m/s^2
Using,s=ut+1/2at^2
1=1/2*1/4*t^2
1=1/8*t^2
t=2√2
So,time taken to cover last 1m=4-2√2=1.7s
Distance traveled=1m
Acceleration=0.25m/s^2
Using,s=ut+1/2at^2
1=1/2*1/4*t^2
1=1/8*t^2
t=2√2
So,time taken to cover last 1m=4-2√2=1.7s
Pata nhi
The ans is wrong becoz it will 1.17 second and not 1.7 seconds
First find the time that needs to cover 1m distance and then from that find the final velocity at the end of 1m. Then with distance formula s=ut+1/2at^2 find the time.
YES , THE VALUE OF t = 2 root 2 = 2.82 seconds !
4 answers