Please answer Pls answer question 4and 5
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4) (i) the speed of the car b/w 12:00 & 12:30 :
Speed = dist/ time
Speed= 35km/0.5hr
Speed = 70km/hr.
(ii) avg speed of the car
Avg speed = total distance travelled / total time taken
Avg speed= 100km/2hr
Avg speed= 50km/hr.
(iii) No, the car's motion is not an example of uniform motion as the car doesn't cover equal distances in equal intervals of time.
5) (i) velocity of the obj at the end of 2.5 sec = 7sec.
(ii) accln= change in velocity/ time
Accln= 12/6= 2m/s²
(iii)distance covered in the last 4 sec :
S= ut+0.5at²
⇒S= (6)(4)+0.5(2)(16)= 24+16= 40m
Speed = dist/ time
Speed= 35km/0.5hr
Speed = 70km/hr.
(ii) avg speed of the car
Avg speed = total distance travelled / total time taken
Avg speed= 100km/2hr
Avg speed= 50km/hr.
(iii) No, the car's motion is not an example of uniform motion as the car doesn't cover equal distances in equal intervals of time.
5) (i) velocity of the obj at the end of 2.5 sec = 7sec.
(ii) accln= change in velocity/ time
Accln= 12/6= 2m/s²
(iii)distance covered in the last 4 sec :
S= ut+0.5at²
⇒S= (6)(4)+0.5(2)(16)= 24+16= 40m
Sasthasivagiri123:
Thank you soooooooo much
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