Question

A Car initially at rest, picks up a velocity of 72 km/h,Over a distance of 25 m. Calculate (i) Acceleration of the car. (ii) Time in which it picks up the velocity

Answer 1

Answer:

Acceleration is 0.4 $m/s^2$.

Time taken will be 50 secs

Explanation:

(i) You use the third equation of motion $2as = v^2 - u^2$.

s is given as 25 m

v is given as 75 km/h = 20 m/s

u is given as  0m/s(at rest)

therefore, after calculating you get a = 2/5 or 0.4$m/s^2$

(ii)  You use first equation of motion v = u + at.

v is given as 75 km/h = 20 m/s

u is given as  0m/s(at rest)

a we found as 0.4$m/s^2$

therefore, after calculating you get t = 50 seconds.

Answer 2

Answer:

Acceleration is 0.4 m/s^2m/s

Acceleration is 0.4 m/s^2m/s 2

Acceleration is 0.4 m/s^2m/s 2 .

Acceleration is 0.4 m/s^2m/s 2 .Time taken will be 50 secs

Explanation:

(i) You use the third equation of motion 2as = v^2 - u^22as=v

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u 2

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u 2 .

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u 2 .s is given as 25 m

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u 2 .s is given as 25 mv is given as 75 km/h = 20 m/s

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u 2 .s is given as 25 mv is given as 75 km/h = 20 m/su is given as 0m/s(at rest)

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u 2 .s is given as 25 mv is given as 75 km/h = 20 m/su is given as 0m/s(at rest)therefore, after calculating you get a = 2/5 or 0.4m/s^2m/s

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u 2 .s is given as 25 mv is given as 75 km/h = 20 m/su is given as 0m/s(at rest)therefore, after calculating you get a = 2/5 or 0.4m/s^2m/s 2

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u 2 .s is given as 25 mv is given as 75 km/h = 20 m/su is given as 0m/s(at rest)therefore, after calculating you get a = 2/5 or 0.4m/s^2m/s 2

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u 2 .s is given as 25 mv is given as 75 km/h = 20 m/su is given as 0m/s(at rest)therefore, after calculating you get a = 2/5 or 0.4m/s^2m/s 2 (ii) You use first equation of motion v = u + at.

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u 2 .s is given as 25 mv is given as 75 km/h = 20 m/su is given as 0m/s(at rest)therefore, after calculating you get a = 2/5 or 0.4m/s^2m/s 2 (ii) You use first equation of motion v = u + at.v is given as 75 km/h = 20 m/s

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u 2 .s is given as 25 mv is given as 75 km/h = 20 m/su is given as 0m/s(at rest)therefore, after calculating you get a = 2/5 or 0.4m/s^2m/s 2 (ii) You use first equation of motion v = u + at.v is given as 75 km/h = 20 m/su is given as 0m/s(at rest)

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u 2 .s is given as 25 mv is given as 75 km/h = 20 m/su is given as 0m/s(at rest)therefore, after calculating you get a = 2/5 or 0.4m/s^2m/s 2 (ii) You use first equation of motion v = u + at.v is given as 75 km/h = 20 m/su is given as 0m/s(at rest)a we found as 0.4m/s^2m/s

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u 2 .s is given as 25 mv is given as 75 km/h = 20 m/su is given as 0m/s(at rest)therefore, after calculating you get a = 2/5 or 0.4m/s^2m/s 2 (ii) You use first equation of motion v = u + at.v is given as 75 km/h = 20 m/su is given as 0m/s(at rest)a we found as 0.4m/s^2m/s 2

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u 2 .s is given as 25 mv is given as 75 km/h = 20 m/su is given as 0m/s(at rest)therefore, after calculating you get a = 2/5 or 0.4m/s^2m/s 2 (ii) You use first equation of motion v = u + at.v is given as 75 km/h = 20 m/su is given as 0m/s(at rest)a we found as 0.4m/s^2m/s 2

(i) You use the third equation of motion 2as = v^2 - u^22as=v 2 −u 2 .s is given as 25 mv is given as 75 km/h = 20 m/su is given as 0m/s(at rest)therefore, after calculating you get a = 2/5 or 0.4m/s^2m/s 2 (ii) You use first equation of motion v = u + at.v is given as 75 km/h = 20 m/su is given as 0m/s(at rest)a we found as 0.4m/s^2m/s 2 therefore, after calculating you get t = 50 seconds.