a particle starts with velocity 20 m/s  with constant retardation of 4m/s^2.find distance travelled in 7 seconds

Asked by rahi7102005 | 20th May, 2021, 07:52: PM

Expert Answer:

Distance travelled with retardation is determined from the following relation
 
"  S = ( u t ) - [ (1/2) a t2 ] "
 
where u is initial speed , t is time of travel and a is retardation
 
S = ( 20 × 7 ) - [ (1/2) × 4 × 7 × 7 ] =  42 m

Answered by Thiyagarajan K | 21st May, 2021, 08:23: AM